Sports Betting Analytics Glossary
33 terms used in player prop research, defined in plain English. These are the statistics and market concepts behind the tools in Statyx — the pitch-level and shot-level inputs that explain why a number moves, rather than a colour telling you a player is hot or cold.
Betting & market basics
The vocabulary of the market itself: how a price is expressed, what the book keeps, and how to tell a good number from a bad one.
- Player prop
- A bet on an individual player’s statistical output rather than the game result — passing yards, points, strikeouts, shots on target. Almost always offered as an over/under against a posted line.Used in: All sportsSee it in Statyx →
- Line
- The number a sportsbook posts for a market, such as 27.5 points. You wager on whether the real result finishes above or below it.Used in: All sports
- American odds
- Price format where a negative number is the stake required to win 100 (−150 risks 150 to win 100) and a positive number is the profit on a 100 stake (+130 wins 130).Used in: All sports
- Implied probability
- The win probability baked into a price. Convert American odds to decimal, then take the reciprocal. Comparing implied probability to your own estimate is the basis of finding value.
- VigorishVig / juice
- The sportsbook’s margin, visible when the implied probabilities of both sides of a market add up to more than 100%. Removing the vig gives the book’s true estimate, which is what a fair-odds model should be compared against.
- Expected valueEV
- The average profit or loss a wager would return if it were repeated indefinitely. A positive EV bet is one where your estimated probability is higher than the probability implied by the price.See it in Statyx →
- Closing line valueCLV
- The difference between the price you took and the price the market settled at before the event started. Consistently beating the closing line is a common way to judge whether an edge is real rather than lucky.See it in Statyx →
- Arbitrage
- Backing every outcome of a market at different sportsbooks so the combined implied probability falls under 100%, locking in a return regardless of the result.See it in Statyx →
- Line shopping
- Checking the same market across multiple sportsbooks and taking the best available number. Half a point on a prop line changes the break-even probability materially.See it in Statyx →
- Hit rate
- How often a player has cleared a given line over a defined sample, such as the last 10 games. Useful as a starting point, but it describes past results and does not by itself account for the upcoming matchup.
- Same game parlaySGP
- Multiple wagers from a single game combined into one ticket. Legs are correlated, so books price them differently from independent parlays.See it in Statyx →
Baseball (MLB) metrics
Pitch-level and batted-ball measurements. These are the inputs behind strikeout, home run and total-base props.
- Whiff rate
- The share of swings against a pitcher that miss entirely. A high whiff rate is one of the more direct indicators of strikeout upside, because it measures swing-and-miss rather than outcomes that depend on fielders.Used in: MLB strikeout propsSee it in Statyx →
- Chase rate
- How often a hitter swings at pitches outside the strike zone. Pairing a high-chase lineup with a pitcher who lives off the plate is a classic strikeout-prop angle.Used in: MLB strikeout props
- Swinging-strike rateSwStr%
- Swings and misses as a share of all pitches thrown, not just swings. Because the denominator includes taken pitches, it blends whiff ability with how often a pitcher induces swings at all.Used in: MLB strikeout props
- Exit velocity
- How fast the ball leaves the bat, in miles per hour. Harder contact travels further and finds gaps more often, so it underpins home run and total-base markets.Used in: MLB home run and total-base props
- Barrel rate
- The share of batted balls hit in the combination of exit velocity and launch angle that historically produces the best outcomes. It is a more stable signal of power than home run totals over a short sample.Used in: MLB home run props
- Strikeout rateK%
- Strikeouts as a share of batters faced (for a pitcher) or plate appearances (for a hitter). The headline number behind pitcher strikeout markets.Used in: MLB
- Walk rateBB%
- Walks as a share of batters faced or plate appearances. High walk rates shorten outings by driving pitch counts up, which caps strikeout totals.Used in: MLB
- Putaway pitch
- The pitch a pitcher goes to with two strikes. Knowing whether it is a slider, changeup or fastball tells you which hitters are most exposed.Used in: MLB strikeout props
- Batter vs. pitcherBvP
- The head-to-head history between a specific hitter and pitcher. Samples are usually small, so it is best read alongside pitch-type and zone data rather than on its own.Used in: MLB
- Park factor
- How much a given ballpark inflates or suppresses run scoring and home runs relative to league average, driven by dimensions, altitude and weather.Used in: MLB
Matchup & usage metrics
Football, basketball and soccer measurements that describe opportunity and opponent difficulty — the context a raw season average hides.
- Defense vs. positionDVP
- How generously a team defends a specific position, measured by what opposing players at that position produce against them. It separates a soft matchup from a genuinely tough one.Used in: NFL, NBA, WNBASee it in Statyx →
- Red zone usage
- Targets and carries a player receives inside the opponent’s 20-yard line. It is the clearest driver of anytime-touchdown markets, since that is where most scoring happens.Used in: NFL touchdown propsSee it in Statyx →
- Coverage scheme
- Whether a defense plays predominantly man or zone, and which cornerback travels with which receiver. It determines who a receiver actually faces on most snaps.Used in: NFL receiving props
- Pace
- How many possessions a team uses per game. Faster pace means more shot and rebound opportunities for everyone on the floor, lifting the ceiling on counting-stat props.Used in: NBA, WNBASee it in Statyx →
- Usage rate
- The share of a team’s possessions a player finishes while on the court, via a shot, free throw trip or turnover. High usage concentrates production in fewer players.Used in: NBA, WNBA
- Shot chart
- A map of where a player attempts and makes shots. Read against an opponent’s zone defence, it shows whether a player’s preferred areas are available in this matchup.Used in: NBA, WNBASee it in Statyx →
- Shots on targetSOT
- Goal-bound attempts that force a save or score. A more frequent and therefore more predictable market than goalscorer props.Used in: SoccerSee it in Statyx →
- Expected goalsxG
- The probability a given shot becomes a goal, based on characteristics like distance, angle and body part. Summed across a match it describes chance quality rather than finishing luck.Used in: Soccer
- Referee tendency
- How strictly a given official calls fouls and issues cards. It is one of the strongest inputs into card and booking markets.Used in: Soccer card propsSee it in Statyx →
Put these numbers to work
Every term above maps to a screen inside Statyx. Start with the sport you follow most, then compare your read against the live market.
Frequently asked questions
Frequently asked questions- What is the difference between a player prop and a game bet?
- A game bet is decided by the result or combined score of the match, such as a moneyline, spread or total. A player prop is decided by one individual’s statistical output, like passing yards or strikeouts, and settles independently of who wins.
- Which stats matter most for MLB strikeout props?
- Whiff rate, chase rate and swinging-strike rate describe how often a pitcher misses bats, while strikeout rate and walk rate describe how many batters he is likely to face before his pitch count ends the outing. The opposing lineup’s chase rate matters just as much as the pitcher’s own numbers.
- What does defense vs. position mean in betting?
- Defense vs. position, or DVP, measures how much production a team allows to opponents at a specific position rather than overall. A defense can be strong on aggregate while still being exploitable against one position, which is exactly the gap player props are priced on.
- Is a high hit rate enough to bet a prop?
- No. A hit rate describes what has already happened over a chosen sample and says nothing about the upcoming opponent, the player’s current role or the price on offer. It is a starting filter, and matchup data plus the market price determine whether the bet is actually worth making.
- What is closing line value and why does it matter?
- Closing line value is the gap between the price you took and the price the market settled at. Because the closing line is the market’s most informed estimate, consistently beating it suggests your process is finding real edges rather than winning by variance.