As is well known, the officiating in MLB 12 The Show can be set to a variable quality of accuracy. You can either have it perfect, or home plate umpires can have personal strike zones and tendencies, blow close plays and refuse to ring up hitters on a checked swing.
Those who frequently play MLB The Show, which has included umpiring "personalities" as far back as 2007, can even develop expectations of what a particular umpire will and won't call for a strike at the edges of the standard strike zone. It leads to some pretty humorous complaining, very much like what you hear from managers, pitchers and booth analysts in real life.
One thing you can't do, however, is pick your umpire. If Porter Callahan gives the outside strike to right handers (I'm making that up, I have no idea if he does) you can't select him to go behind home plate.
Or can you?
In putting together my version of Deadspin's "Better Know an Umpire", I discovered that all umpiring crews in MLB 12 The Show's Exhibition mode—the one-off "play now" mode—are fixed to each stadium. What's more, the same group of four all work together, rotating their assignments at other stadiums. Kerwin Thompson, Rusty Valentine (which sounds like an Urban Dictionary entry), Tom Reyburn and C.B. Hernandez will not work with anyone else.