This season, Craig Biggio took all of Jason Hirsh's uniform and stuff out of his locker room in a road game and put it away (trainer's room, packed away). All he left in the locker room was a jockstrap. Apparently, Hirsch was scheduled to pitch that day and he arrived only one hour before game time.
Biggio got fumed at the rookie thinking he had it made and could half-step it that way. So Bidge sent him a message "Someone went home because of you... respect that and play hard because of it!". It was a message well recieved by Hirsh, who claims he didn't do it intentionally. However, he hasn't done it accidently any more either. It's what veterans will do to teach young guys about professionalism.
In Pujol's case, I'm not sure if anyone has taken him under their wing, in terms of a veteran. I would think it's hard when the young guy is ten times better in talent and ability than any veteran they've had. I can't see a good professional like Reggie Sanders, for instance, going up to Pujols and instructing him on the finer points of comportment.
Pujols is just going to have to mature on his own because in this case, he's his own worse enemy or his own best friend.
