"I just said, 'Way to go, that's pretty cool,'" Pettitte said. "He was laid-back about it. He actually seemed more excited a couple of days later when he called me and he got the game-winning hit in the sixth inning with two outs. When I called him about the no-hitter, he was like, 'Yeah, I felt pretty good.'"
Pettitte, 18, has committed to Baylor University. The elder Pettitte said that his son was throwing around 84 mph last summer, which was a tick low for Division I play, but his frame is filling out and he is now lighting up radar guns around 88 mph.
"It's cool. It really is," Pettitte said. "It's exciting, and I'm excited for him. He's worked hard, and for him to be your kid and see how he has developed over the last year -- last summer, when a lot of his friends and peers were getting looks from Division I colleges, that's what he wanted."
Josh Pettitte often joins the Yankees during the season and has served as a batboy on select road trips. He told FOX Sports Southwest that his father sends him a text message before every game, and that Andy's experience has been valuable in breaking down his own performances.
"We'll talk about pitch sequences and what he would have done," Josh said. "It's pretty good to talk to him about this stuff, because he knows what he's talking about. He's one of the most mentally tough players there is out there. We talk about the mental parts of the game."
Scouts from professional teams have been showing up at Pettitte's games, and the Yanks veteran said that he will not dissuade his son from signing with a big league organization if he is selected in this June's First-Year Player Draft.
"I've got to leave the door open," Pettitte said. "I think we've got him in a real good place right now from the standpoint of, don't worry about the pro stuff right now. He's got scouts at every game watching him pitch, but just go out and pitch, and be yourself.
"I don't want him overthrowing or hurting himself trying to get his velocity up. He's got a great alternative to go play college baseball, and come May he'll probably have to start figuring out if that's something he's interested in. I'm open to it. It's his life, he'll be 19 in November, and I'll definitely talk to him about it."