[Syd Thrift]

I also *think* that sidearm causes the game to not select certain pitch types as available for a pitcher during player generation (and I guess random talent bumps). In the 70s when we saw a wave of these guys, they were mostly relievers who threw sinkers and sliders. The arm angle doesn't really work to throw a cutter (well, to some extent, I guess, because of the extreme angle all fastballs a sidearmer throws are cut fastballs in terms of the direction they travel but whatevs) and pitches like the screwball or knuckle-curve are hard to impossible to throw.

But yeah, it's mainly platoon splits. I don't *think* the game does much with control against either handedness, the theory being (I guess) that a guy who is wild is wild with everyone, and movement for whatever reason doesn't change either (maybe because they figure that movement is kind of a version of control, being the ability to keep the ball off the meaty parts of the plate). I would guess that arm slot would have the same (lack of) effect on both of those. I will add that as the primary (almost complete) effect of stuff is to increase strikeouts, and a pitcher who strikes a batter out is a pitcher who can't give up the longball, you should still see fewer HRs vs same-handed batters as opposite-handed ones.