Risk $100 → profit $200
Implied probability: 33.3%
THE PNR RESEARCH ACADEMY
KNOW THE GAME.
READ THE SIGNAL.
109BETTING + SPORTS ANALYTICS
DEFINITIONS, CONTEXT & PITFALLS
DEFINITIONS, CONTEXT & PITFALLS
Risk $200 → profit $100
Implied probability: 66.7%
Risk $10 → return $25 total
Profit: $15
109 concepts found
BASICS
Action
Having money wagered on an event.
ODDS
American odds
Odds shown with a plus or minus sign. Positive odds show profit on a $100 bet; negative odds show how much must be risked to profit $100.
STRATEGY
Arbitrage
Betting every possible outcome at different prices so the combined wagers lock in a small profit. Opportunities are uncommon and disappear quickly.
MARKETS
ATS
Against the spread: a result after accounting for the point spread, not simply wins and losses.
SLANG
Backdoor cover
A late score that changes which side covers the spread without changing the likely winner.
MONEY
Bankroll
Money specifically set aside for betting. It should never include money needed for bills or necessities.
BASICS
Best bet
A bettor or capper’s preferred play. It is still an opinion—not a guarantee.
BASICS
Bet slip
The screen or ticket showing selections, odds, stake and possible payout.
BASICS
Book / Sportsbook
A licensed company that accepts wagers and posts betting lines.
MARKETS
Buy points
Paying additional juice to move a spread or total to a more favorable number.
PEOPLE
Capper
Short for handicapper: someone who researches games and shares or sells betting picks.
MONEY
Cash out
Accepting a sportsbook’s settlement before a wager finishes. The offer may be below the bet’s fair current value.
ODDS
Closing line
The final market price immediately before an event begins.
STRATEGY
Closing line value (CLV)
How your bet’s price compares with the closing price. Beating the close can indicate strong timing but does not guarantee profit.
ODDS
Consensus
A general market opinion or average line compiled from multiple sportsbooks.
MARKETS
Cover
Winning a point-spread wager. A team can lose the game but still cover.
ODDS
Decimal odds
Total return per $1 staked, including the original stake. At 2.50, a $10 bet returns $25 total.
BASICS
Dog / Underdog
The side considered less likely to win, usually carrying positive odds.
SOCCER
Double chance
A soccer market covering two results: home or draw, away or draw, or either team to win.
SOCCER
Draw no bet (DNB)
A soccer wager where a draw returns the stake.
STRATEGY
Edge
A perceived advantage when your estimated probability is better than the market price after accounting for vig.
ODDS
Even money
A wager priced at +100 or 2.00. Potential profit equals the stake.
STRATEGY
Expected value (EV)
The estimated average profit or loss if the same wager could be repeated many times at the same probability and price.
BASICS
Favorite
The side considered more likely to win, commonly shown with negative odds.
BASEBALL
First five (F5)
An MLB wager graded only on the first five innings.
MARKETS
Futures
Long-term wagers such as a champion, award winner or season win total.
PEOPLE
Handicapper
Someone who analyzes matchups and estimates probabilities or lines; often called a capper online.
STRATEGY
Hedge
Placing another wager to reduce the risk of an existing position, usually sacrificing some potential profit.
SLANG
Hook
The half-point in a spread or total, such as -3.5.
ODDS
Implied probability
The win probability suggested by odds before removing vig. +200 implies 33.3%; -200 implies 66.7%.
MONEY
Juice / Vig
The sportsbook’s built-in fee or margin. At -110, risk $110 to profit $100.
MARKETS
Live betting / In-play
Wagers placed after an event begins, with prices changing as play develops.
SLANG
Lock
A supposedly certain winner. No wager is guaranteed; treat this word as hype.
MARKETS
Moneyline (ML)
A bet on who wins without a point spread.
ODDS
Negative odds
The amount required to risk for $100 profit. At -150, risk $150 to earn $100 profit.
STRATEGY
No-vig probability
An estimate of true market probability after removing the sportsbook margin.
PROMOTIONS
Odds boost
A promotion improving the payout price, usually with limits and special terms.
MARKETS
Over/Under / Total
A wager on whether a combined result or player statistic finishes above or below a number.
MARKETS
Parlay
Multiple selections combined into one wager. Every leg generally must win.
ODDS
Pick’em / PK
A market with no favorite; in spreads both teams are effectively listed at zero.
MARKETS
Player prop
A wager on an individual player statistic or event.
ODDS
Positive odds
Profit on a $100 winning stake. At +250, a $100 winner earns $250 profit.
STRATEGY
Positive EV (+EV)
A wager believed to offer a positive long-run return because its odds exceed your estimated fair odds.
DATA
Projected lineup
An expected starting lineup based on available information. It is not official and can change.
MARKETS
Prop bet
A wager beyond the basic winner, spread or total, involving a player, team or event.
RESULTS
Push
A tie between the result and posted line; the stake is normally returned.
MARKETS
Round robin
A group of smaller parlays created from a larger list. It reduces all-or-nothing risk but raises total stake.
MARKETS
Same-game parlay (SGP)
Multiple selections from the same event combined into one wager.
PEOPLE
Sharp
A sophisticated bettor respected for pricing, modeling or long-term decisions.
MARKETS
Spread
A handicap applied to the score. A -4.5 favorite must win by at least five.
MONEY
Stake
The amount risked on a wager.
ODDS
Steam move
Fast, broad line movement, often following influential action or new information.
MARKETS
Straight bet
One wager on one outcome rather than a parlay.
MARKETS
Teaser
A parlay with adjusted lines in the bettor’s favor in exchange for lower payout.
SLANG
Ticket
Another word for a wager or bet slip.
PEOPLE
Tipster
A person who provides betting suggestions; more common internationally than capper.
PEOPLE
Tout
Usually a negative term for someone aggressively selling picks with exaggerated claims.
MONEY
Unit
A standardized stake used to discuss bet size without revealing dollars.
RESULTS
Void
A canceled wager whose stake is returned.
STRATEGY
Value bet
A wager where the available price is believed to exceed the outcome’s true probability.
BASKETBALL
Usage rate (USG%)
Share of team possessions a player finishes while on court through a shot, free-throw trip or turnover.
Why it matters in research
RESEARCH VALUEHelps estimate scoring opportunity when roles change.
PUT IT TO WORKCompare usage with minutes after a teammate is ruled out.
WATCH OUTHigher usage does not guarantee efficient scoring.
BASKETBALL
True shooting (TS%)
Scoring efficiency that combines field goals and free throws.
Why it matters in research
RESEARCH VALUESeparates efficient scoring from raw volume.
PUT IT TO WORKRead TS% beside shot attempts and minutes.
WATCH OUTA brief hot shooting stretch is a noisy sample.
BASKETBALL
Pace
An estimate of possessions per regulation-length game.
Why it matters in research
RESEARCH VALUEMore possessions can create more chances for counting stats.
PUT IT TO WORKCompare both teams’ pace before researching a total.
WATCH OUTOvertime and game state can distort raw per-game averages.
BASKETBALL
Potential assists
Passes that produce a qualifying teammate shot opportunity, whether made or missed.
Why it matters in research
RESEARCH VALUECan reveal creation volume hidden by teammates missing shots.
PUT IT TO WORKCompare recent potential assists with actual assists.
WATCH OUTTracking definitions and minutes must be consistent.
BASKETBALL
Rebound chances
Tracking-based opportunities to collect a rebound.
Why it matters in research
RESEARCH VALUEDistinguishes opportunity from conversion luck.
PUT IT TO WORKInspect chances when a starting center is absent.
WATCH OUTPosition, opponent shooting and shared court time matter.
BASKETBALL
Net rating
Offensive rating minus defensive rating, expressed per 100 possessions.
Why it matters in research
RESEARCH VALUEProvides a pace-adjusted view of team or lineup performance.
PUT IT TO WORKCompare lineups with and without a starter.
WATCH OUTSmall lineup samples and opponent strength can mislead.
SOCCER
Expected goals (xG)
A model estimate of how likely a shot is to become a goal.
Why it matters in research
RESEARCH VALUEDescribes chance quality beyond the final score.
PUT IT TO WORKCompare a forward’s shot volume and xG across starts.
WATCH OUTDifferent models use different inputs; xG is not a promise.
SOCCER
Non-penalty xG
Expected goals with penalties excluded.
Why it matters in research
RESEARCH VALUEHelps distinguish open-play threat from penalty duty.
PUT IT TO WORKCheck it alongside whether a player takes penalties.
WATCH OUTSet-piece role and minutes still matter.
SOCCER
Expected assists (xA)
A model estimate of the assist potential of passes; definitions vary by provider.
Why it matters in research
RESEARCH VALUEHelps evaluate chance creation beyond completed assists.
PUT IT TO WORKCompare a creator’s xA with teammates’ finishing.
WATCH OUTDo not mix shot-based and pass-based xA definitions.
SOCCER
Shots on target
Attempts classified as on target under the provider’s event rules.
Why it matters in research
RESEARCH VALUEDirectly relevant to shots-on-target props.
PUT IT TO WORKCheck attempts per start and projected minutes.
WATCH OUTBlocked shots and woodwork need the book’s exact rules.
SOCCER
PPDA
Opponent passes allowed per defensive action within a defined area.
Why it matters in research
RESEARCH VALUEOffers context about pressing intensity.
PUT IT TO WORKConsider whether pressure changes a team’s buildup.
WATCH OUTTerritory, possession and provider zones affect comparisons.
SOCCER
Per 90
A rate scaled to 90 minutes played.
Why it matters in research
RESEARCH VALUEAllows comparisons between players with different minutes.
PUT IT TO WORKConvert a rate using realistic projected playing time.
WATCH OUTSubstitutes may face very different game states.
BASEBALL
Barrel rate
The share of batted balls meeting Statcast’s barrel contact classification.
Why it matters in research
RESEARCH VALUEHelps research power contact rather than recent home runs alone.
PUT IT TO WORKPair barrel rate with expected plate appearances.
WATCH OUTPitcher matchups and park conditions still matter.
BASEBALL
Hard-hit rate
Share of batted balls with exit velocity of at least 95 mph.
Why it matters in research
RESEARCH VALUEAdds contact-quality context to hitter form.
PUT IT TO WORKCompare sustained changes with swing and role changes.
WATCH OUTHard contact can still become an out.
BASEBALL
Launch angle
Vertical angle of a ball as it leaves the bat.
Why it matters in research
RESEARCH VALUEExplains whether contact tends toward grounders or airborne balls.
PUT IT TO WORKInspect the distribution alongside exit velocity.
WATCH OUTAverages can conceal very different contact patterns.
BASEBALL
xwOBA
A contact-quality estimate of weighted offensive production, also accounting for walks and strikeouts.
Why it matters in research
RESEARCH VALUEAdds context when observed results diverge from contact quality.
PUT IT TO WORKCompare it with actual production over a meaningful sample.
WATCH OUTIt is not a guaranteed forecast of future results.
BASEBALL
Platoon split
A player’s performance separated by opponent handedness.
Why it matters in research
RESEARCH VALUEHelps evaluate batter-pitcher matchup context.
PUT IT TO WORKCheck left-versus-right performance and lineup position.
WATCH OUTSmall head-to-head samples deserve little weight.
BASEBALL
K-BB%
Strikeout percentage minus walk percentage.
Why it matters in research
RESEARCH VALUESummarizes two important pitcher skills.
PUT IT TO WORKRead it beside pitch count and opponent strikeout tendencies.
WATCH OUTIt omits contact quality and defensive support.
FOOTBALL
EPA per play
Average change in expected points associated with a play.
Why it matters in research
RESEARCH VALUEAdds situation context beyond total yardage.
PUT IT TO WORKCompare passing efficiency with opponent quality.
WATCH OUTModel, game state and garbage-time handling matter.
FOOTBALL
CPOE
Completion percentage above the expectation of a pass-difficulty model.
Why it matters in research
RESEARCH VALUEAdds difficulty context to completion rate.
PUT IT TO WORKCompare actual and expected completions across many throws.
WATCH OUTDifferent models and samples are not interchangeable.
FOOTBALL
Target share
The portion of team pass targets directed at a receiver.
Why it matters in research
RESEARCH VALUEHelps estimate receiving opportunity.
PUT IT TO WORKPair target share with projected team pass attempts.
WATCH OUTA high share on a low-volume team can still be modest.
FOOTBALL
Route participation
Share of relevant passing plays on which a player runs a route.
Why it matters in research
RESEARCH VALUEShows whether a receiver is available to earn targets.
PUT IT TO WORKCheck route involvement after an injury return.
WATCH OUTProvider denominators vary; snaps alone are not routes.
FOOTBALL
Air yards
Distance a pass travels beyond the line of scrimmage to its target.
Why it matters in research
RESEARCH VALUESeparates depth of opportunity from yards after the catch.
PUT IT TO WORKCompare target volume with average target depth.
WATCH OUTDeep targets can be less likely to be completed.
FOOTBALL
Success rate
Share of plays classified as successful by a stated rule.
Why it matters in research
RESEARCH VALUEMeasures consistency rather than dependence on big plays.
PUT IT TO WORKCompare EPA-based success with opponent strength.
WATCH OUTDistance-based and EPA-based definitions differ.
HOCKEY
Corsi share
Share of all shot attempts belonging to a team or player’s side.
Why it matters in research
RESEARCH VALUEProvides territorial and possession context.
PUT IT TO WORKCompare five-on-five shot share by line combination.
WATCH OUTIt does not directly measure shot quality.
HOCKEY
Goals saved above expected
Expected goals against minus actual goals allowed under a chosen model.
Why it matters in research
RESEARCH VALUEAdds shot-quality context to goalie results.
PUT IT TO WORKReview goalie form alongside confirmed starter status.
WATCH OUTModel differences and small samples affect interpretation.
HOCKEY
Power-play time
Minutes played while a team has a manpower advantage.
Why it matters in research
RESEARCH VALUEImportant opportunity context for point and shot props.
PUT IT TO WORKCheck first-unit assignment and recent ice time.
WATCH OUTFuture penalties and time on advantage are uncertain.
HOCKEY
PDO
A combination of shooting percentage and save percentage, usually on a specified scale.
Why it matters in research
RESEARCH VALUECan flag unusually high or low finishing and saving results.
PUT IT TO WORKRead it beside team skill and a longer baseline.
WATCH OUTDo not assume every departure is pure luck.
TENNIS
Hold percentage
Share of service games won.
Why it matters in research
RESEARCH VALUEHelps assess service strength and set structure.
PUT IT TO WORKCompare on the same surface against similar opponents.
WATCH OUTIt is not the probability of winning the match.
TENNIS
Break percentage
Share of return games won.
Why it matters in research
RESEARCH VALUEHelps describe return strength.
PUT IT TO WORKPair with opponent hold rate and surface.
WATCH OUTSmall tournament samples can be misleading.
TENNIS
Surface split
Performance separated by clay, grass or hard court.
Why it matters in research
RESEARCH VALUEPlaying conditions can change how skills translate.
PUT IT TO WORKResearch the relevant surface rather than career totals alone.
WATCH OUTCourt speed also differs within surface categories.
GOLF
Strokes gained
Performance measured against a comparison baseline in strokes.
Why it matters in research
RESEARCH VALUESeparates putting, approach and other sources of performance.
PUT IT TO WORKCompare approach play with a course’s demands.
WATCH OUTField strength and baseline definitions matter.
MMA / BOXING
Significant-strike differential
Significant strikes landed minus absorbed, often expressed as a rate.
Why it matters in research
RESEARCH VALUEAdds context to striking exchanges.
PUT IT TO WORKCompare styles and the quality of past opponents.
WATCH OUTScoring also considers other factors; counts are not scorecards.
MMA / BOXING
Takedown defense
Share of opponent takedown attempts successfully defended.
Why it matters in research
RESEARCH VALUEHelps research grappling matchups.
PUT IT TO WORKCheck defense against comparable wrestling styles.
WATCH OUTOpponent quality and attempts are essential context.
CRICKET
Net run rate
A team’s scoring rate minus its conceded scoring rate under competition rules.
Why it matters in research
RESEARCH VALUEProvides scoring-balance context in limited-overs cricket.
PUT IT TO WORKCheck format and competition before comparisons.
WATCH OUTAll-out innings and shortened matches have special rules.
CRICKET
Strike rate
For a batter, runs scored per 100 balls faced.
Why it matters in research
RESEARCH VALUEAdds scoring-speed context to batting production.
PUT IT TO WORKRead it with batting position and match format.
WATCH OUTBowling strike rate means something different.
MOTORSPORT
Green-flag pace
Speed or lap performance while racing under green conditions.
Why it matters in research
RESEARCH VALUESeparates race pace from caution-driven results.
PUT IT TO WORKCompare similar tire age and track conditions.
WATCH OUTTraffic, fuel and strategy affect observed pace.
ESPORTS
Economy rating / resources
The in-game resources available to a player or team under a specific title’s rules.
Why it matters in research
RESEARCH VALUEAdds context to round and map performance.
PUT IT TO WORKAccount for equipment or economy before comparing outcomes.
WATCH OUTMetrics and roles are title-specific.
PNR RESEARCH
Lineup Intent Signal
PNR’s research concept for interpreting selections, rotations and role changes using documented evidence.
Why it matters in research
RESEARCH VALUEConnects lineup decisions to expected opportunity.
PUT IT TO WORKRecord confirmed starters, absences and tactical role changes.
WATCH OUTA lineup does not prove a coach’s private intent.
PNR RESEARCH
Calibration
Agreement between predicted probabilities and observed frequencies over many forecasts.
Why it matters in research
RESEARCH VALUEChecks whether model confidence is meaningful.
PUT IT TO WORKReview whether roughly 60% of 60%-rated outcomes succeed.
WATCH OUTUse enough settled predictions and separate time periods.
PNR RESEARCH
Brier score
Mean squared difference between probabilities and binary outcomes.
Why it matters in research
RESEARCH VALUEEvaluates probability accuracy; lower scores are better.
PUT IT TO WORKCompare against a baseline on the same held-out events.
WATCH OUTDifferent event mixes can make scores incomparable.
PNR RESEARCH
Data leakage
Using information in evaluation that would not have been available at prediction time.
Why it matters in research
RESEARCH VALUECan make a weak model appear accurate.
PUT IT TO WORKFreeze inputs at the pregame forecast timestamp.
WATCH OUTClosing prices must not enter an opening-time forecast.
PNR RESEARCH
Monte Carlo simulation
Repeated sampling from an explicit model to estimate a range of outcomes.
Why it matters in research
RESEARCH VALUEHelps describe uncertainty and linked outcomes.
PUT IT TO WORKVary minutes or role assumptions before comparing a prop.
WATCH OUTMore runs cannot repair poor assumptions.
PNR RESEARCH
Correlation
The degree to which quantities or outcomes move together.
Why it matters in research
RESEARCH VALUEImportant when combining related parlay legs.
PUT IT TO WORKConsider how a quarterback and receiver’s outcomes interact.
WATCH OUTMultiplying marginal probabilities assumes independence.
PNR RESEARCH
Sample size
Number of relevant observations behind a statistic.
Why it matters in research
RESEARCH VALUEShows how much evidence supports a conclusion.
PUT IT TO WORKReport both hit count and attempts for a last-10 trend.
WATCH OUTTen games may contain different minutes, roles or opponents.
MARKET INTELLIGENCE
Opening vs first observed
The actual initial posted price differs from the first price PNR happens to record.
Why it matters in research
RESEARCH VALUEKeeps line-movement history honest.
PUT IT TO WORKLabel a midday first observation with its timestamp.
WATCH OUTDo not call it an opener without evidence.
MARKET INTELLIGENCE
Exact-line comparison
Comparing the same event, participant, period, side, line and settlement rules.
Why it matters in research
RESEARCH VALUEPrevents false best-price and arbitrage signals.
PUT IT TO WORKCompare over 24.5 points only with the same over 24.5 contract.
WATCH OUTA better price on 25.5 is a different proposition.
MARKET INTELLIGENCE
Price dispersion
How far prices differ across comparable sportsbook quotes.
Why it matters in research
RESEARCH VALUEHelps locate disagreements worth further research.
PUT IT TO WORKCompare implied probabilities at one exact line.
WATCH OUTStale prices and unmatched rules can create false outliers.
MARKET INTELLIGENCE
PNR activity
First-party interest such as PNR saves or research interactions, when measured.
Why it matters in research
RESEARCH VALUEDescribes our audience’s attention.
PUT IT TO WORKLabel the action, time window and sample size.
WATCH OUTIt is never sportsbook handle or ticket volume.
KNOWING THE WORDS DOESN’T REMOVE THE RISK.
Odds are probabilities with a sportsbook margin—not promises. Bet only what you can afford to lose.
21+ HELP & RESPONSIBLE GAMBLING