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OAA is calculated differently for outfielders and infielders (details below). Outfielders. Outs Above Average for outfielders starts with Catch Probability, which takes the distance an outfielder must go, the time he has to get there, and the direction he travels to put a percentage of catch likelihood on each individual batted ball.
Jan 4, 2020 · OAA is the cumulative expression of each fly ball hit to an outfielder and his effectiveness at catching those balls in terms of Catch Probability. Statcast measures Catch Probability, or the likelihood that a fly ball will caught, based on the distance the fielder must cover, the time he has to reach the ball, and the direction in which he travels.
Mar 31, 2022 · OAA for outfielders is the season-long cumulative expression of each individual Catch Probability play. For example, if an outfielder has a ball hit to him with a 75 percent Catch Probability — that is, one an average outfielder would make three-quarters of the time — and he catches it, he’ll receive a +.25 credit.
Outs Above Average for infielders takes into account: 1. How far the fielder has to go to reach the ball (“the intercept point”). 2. How much time he has to get there. 3. How far he then is from the base the runner is heading to. 4. On force plays, how fast the batter is, on average.
This can be done on a team or individual basis. For example, in 2019, Nolan Arenado was +21 OAA as a third baseman (the only position he played), but that breaks down into +17 at third base and +4 at shortstop. Field location positions may be expanded into more detailed breakdowns, like “close to the line,” or “up the middle.”
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Mar 12, 2020 · Example: If a ball is hit to an outfielder with the catch probability of 75%, it means there is a 75% chance an average outfielder catches the ball. If the player makes the catch, his OAA increases by +0.25. If he misses, his OAA is reduced by -0.75. Here are the 2019 outfield leaders and their OAA: Victor Robles: 23 ; Kevin Kiermaier: 17
