Both general manager Kevin Towers and manager Kirk Gibson denied that the Bauer's 17 walks in three Triple-A playoff starts had anything to do with the decision not to promote him.
Instead, they cited his innings total and the fact that they did not want to go to a six-man rotation or take one of their other starters out of the rotation for Bauer.
Bauer threw 130 1/3 innings during the Minor League season, 16 1/3 in four big league starts and another 16 1/3 during the Triple-A playoffs.
During both his time in the big leagues and the Minors, the D-backs spoke to Bauer, the No. 3 overall pick in the 2011 First-Year Player Draft, about possibly cutting back a bit on his intense throwing program. Bauer's velocity appeared to be down during the Triple-A Championship game.
"You're going to need those extra bullets late in the season and look at where you're velocity is now, compared to April or May," Towers said. "That could be fatigue. And what causes fatigue? Those are only questions that he can answer for himself."
In addition, the D-backs would like Bauer to be more efficient with his pitches.
"I still think fastball command needs to improve," Towers said. "I think we saw that last night. I think he needs to trust his fastball a little bit more, he likes to go to his secondary stuff. I think he's still a little strikeout happy.
"I talked to him a little bit about that last night. Just reflect on the season, be positive, [think about] things that you think you may change that would keep you more ready every fifth day. I think it's really going to have to come from him. He's the type of kid that I think he feels pretty strong about the way he goes about doing things. I think he realizes now, after a full Minor League season, pitching every fifth day is different than it was in college."
Towers said that Bauer was likely to be named the organization's Pitcher of the Year, after going 12-2 during the regular season for Double-A Mobile and Triple-A Reno.