"I dealt with it all season, it's nagged," he said. "I thought I had gotten rid of it, then it kind of popped up again. I don't feel it at all today."
The other reasons Bauer left the game early was due to his having pitched briefly three days earlier and the high temperatures in Atlanta during his outing.
"When I looked down the bench, he was very disappointed in himself, but we talked to him about it, there was no disappointment for us," D-backs manager Kirk Gibson said. "He busted his tail, it was just time to get him out of the game. He's got great stuff, we know that, we just have to get him to apply it correctly.
"He's very competitive. I feel good about the way he'll figure things out."
Even though he didn't pitch as far into the game as he would have liked, Bauer came away from his first start encouraged with the experience.
"It was good to get my feet wet, I'd never played in a stadium that big with that many people," Bauer said. "I wasn't out there a whole lot, I didn't get a chance to learn a whole lot, but I'll be more comfortable with the energy and the routine this time."
The D-backs' top prospect will likely again be on a pitch count when he takes the mound on Tuesday, but if it was up to him, that number would be extremely high.
"Hopefully it's 250 pitches," Bauer joked. "Probably not realistic, but Nolan Ryan threw 244 pitches in a complete game 16-inning win. Most in MLB history. It hurt him so much, he quit pitching 15 years later."