That is true, but strained scar tissue is a random and usually few and far between problem. as i said i've had the same problem with scar tissue and in 3 years i've strained it twice..after awhile, it goes away with no lingering side effects. granted its happened to him twice, but he's been in the minors pitching a couple times and has had no problems.
As for pitching against a real team, yeah the braves suck right now, but I'm pretty sure that a pitcher with a good selection of pitches, and a velocity of 96-98MPH can hold his own against any offense.