[NoOne]

i've been doing that for a month now -- even lower pitch counts than the ai uses at R-AAA per level. think i go from 85 or 90 at rookie, 90 at sa and a, 95 at aa/aaa -- give or take, but 95 capped. i can't say it helps increase stamina whatsoever. i'm fairly certain overworking them will negatively impact their ratings in general, of which stamina is one.

so, don't overwork them and that's as best you can do. the rest is just random

a nice side effect is it's using my relievers more -- well i like it. the sp still get plenty of work (~150-160ip in A to ~170-180ip in AAA). probably reduces risk of injury a bit with SP (increases rp risk, oh well), while not losing much bang for your buck on playing time's effect (which is said to be a small amount? i believe)

not pitching while 'slightly tired' or worse is nothing but a positive thing in the MiL. don't waste those proverbial bullets.

if it's just an AI thing, just make use of force role -- for any position. an odd way i use it is sometimes to make a CL an RP and an RP a CL -- to force the AI to use those 2 at the top, which otherwise would bury the lower rated non-cl guy on depth chart that i prefer. you can force a closer to the top, but you can't force a less-liked RP up on dpeth chart, otherwise.