Outs Above Average
Outs above average: plays made compared with how hard they were.
What it actually is. Outs above average: the tracking-era defensive measure, counting outs made against the probability of making them, based on how far the fielder had to go, how much time he had, and where the throw was.
What a scout reads off it. The best defensive number available, because it starts from the physical difficulty of the play rather than from a zone map or a scorer's opinion. It answers the question the error column never could: did he get to it.
Batter's Eye: look up anything in baseball