Glossary

Short, plain definitions for the words on DiamondEdge cards, results and slips. Tap any dotted word in the app to see its definition in place.

On every card

Diamonds (1 to 5): The DiamondEdge rating. The model scores recent form, matchup, workload or role, game conditions, and lineup or availability status. More diamonds means more of those signals line up. It is a research signal, not a promise or a win chance.
L5, L10 and L20: How often the player hit this line in their last 5, 10 or 20 games. "7 of 10" means the stat went past the line in 7 of the last 10 games. Green bars hit the line; gray bars missed. Past games do not decide the next one.
Projection vs line: The projection is the model's estimate of the player's stat for this game. The line is the target the card is measured against. When the projection sits past the line in the card's direction, the numbers lean that way. Projections miss often, so read them with the hit rates.
DiamondEdge line: A target DiamondEdge sets from the player's own game log, like 1.5 total bases or 63+ rushing yards. It is not a sportsbook line and has no odds or price. Your book's line may be different.
Data confidence: How much data sits behind the rating. High: a full, stable recent sample. Standard: enough recent data for a solid read. Limited: a short or uneven sample, so weigh it lightly. It rates the data, not the pick.

Hit rate: How often the stat cleared the line. "7 of 10" is a 70% hit rate over the last 10 games. Always read it next to the sample size.
Sample size: How many games or plate appearances a number comes from. Small samples, under about 10 games, swing a lot and say little on their own.

Void: A pick that is graded neither a win nor a loss, usually because the player did not play or the game was postponed. Voids are left out of every hit rate on DiamondEdge.
DNP: Did not play: the player was inactive or never got into the game. A prop on a player who does not play is usually voided, not counted as a miss.
Push: The stat lands exactly on a whole-number line, like 6 strikeouts on a line of 6. It is not a win or a loss, and DiamondEdge leaves it out of the hit rate.

Unit: A fixed amount someone treats as their standard stake, often 1% of a set budget. Tracking in units lets people compare results without naming dollar amounts.
Break-even: The hit rate needed to come out even over time at a given price. At -110 it is 52.4%: about 52 wins in every 100 just to stay level.
Implied probability: The win chance built into a price. -110 implies 52.4% and +150 implies 40%. Both sides of a market add up to more than 100% because the operator keeps a margin.
Flex: A pick'em entry that can still pay a smaller amount when one pick (sometimes two) misses. The trade-off is a lower payout, so each pick has to hit more often just to break even.
Power play: A pick'em entry where every pick has to hit for it to pay. One miss and the whole entry loses, which is why the payout is bigger than a flex entry.

K%: Strikeout rate: strikeouts divided by batters faced (pitchers) or plate appearances (hitters). League average usually sits in the low 20s.
BB%: Walk rate: walks divided by batters faced (pitchers) or plate appearances (hitters). A high walk rate for a pitcher means more traffic and often a shorter outing.
Leash: How long a manager lets a starting pitcher work, measured by pitch count or batters faced. A short leash caps strikeouts and outs no matter how well the pitcher throws.
BvP: Batter vs pitcher: a hitter's past results against today's pitcher. These samples are usually tiny, often under 20 plate appearances, so BvP is weak evidence alone.
CSW: Called strikes plus whiffs, as a share of all pitches: how often a pitcher wins a pitch. DiamondEdge does not show CSW; it is here because other sites use it.
Park factor: How a ballpark changes a stat compared with an average park. A home run factor of 1.10 means about 10% more home runs than average there. Weather can move it on a given day.
NRFI: No Run First Inning: neither team scores in the first inning. The opposite is YRFI (Yes Run First Inning). It depends on both starters and the top of both lineups.

Target share: The share of a team's pass targets that go to one player. A 25% target share means about one in every four throws was aimed at them.
Air yards: How far a pass travels past the line of scrimmage, counted on every target whether or not it is caught. More air yards means deeper looks.
aDOT: Average depth of target: air yards divided by targets. A high aDOT means deep routes (bigger plays, fewer catches); a low aDOT means short, steadier catches.
Red zone share: The share of a team's plays inside the opponent's 20-yard line that go to one player, as targets or carries. Most touchdowns start in the red zone.

Research only, 21+. DiamondEdge is a research platform, not a sportsbook. If gambling stops being fun, call 1-800-GAMBLER.