They're more diplomatic than most fans, needless to say, but they do make a lot of references to psychological stuff. One comment that stuck with me was when Roger Clemens got shelled by the Red Sox in Game 3 of the 1999 ALCS, in the matchup with Pedro, and Joe Torre said afterward "I think the moment might have been a little too big for Roger."
I have mentioned this before, but in the sport of golf, the concept of choking is openly discussed by players and commentators. Everyone seems to acknowledge that in golf choking or not choking is a big part of the game.