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Re:What Can Hitters Actually See Out of a Pitcher’s Hand? by MaxLeiter on Sunday September 18, 2016 @02:55PM (#12526586)
Probably not.

MLB teams play 162 games a season, you can probably consider pre-season games to be practice for game-sitation pitching.

The players get plenty of out-of-game practice from spring training and experience (minors, college, etc).

Re:What Can Hitters Actually See Out of a Pitcher’s Hand? by sigusr1 on Sunday September 18, 2016 @03:39PM (#12526797)
I don't see how they could not benefit. How many pitches a game are they seeing? Like 15? If you had the pitches for it (I don't think they do), it seems like you could do a few hundred a day if you were deliberately practicing.