Corbin allowed three hits, but he did not walk a batter while fanning three in three innings.
"He threw very well," D-backs manager Kirk Gibson said. "He was very aggressive. He had a good pace to his game. He did a good job holding the runner over there at first. Mixed it up. And he was very athletic on the swinging bunt. Real impressive."
Trevor Bauer, the No. 3 overall pick in last year's Draft, followed Corbin to the mound and allowed one hit and walked one while fanning three in two innings.
"He threw the ball well," Gibson said.
Bauer is used to starting games, and in order to get his very regimented pregame routine in, the team allowed him to get loose at the beginning of the game.
So while Corbin warmed up in the bullpen, Bauer played long toss in the outfield.
Then when Corbin took the mound to start the game, Bauer went to the bullpen and threw a couple of simulated innings while Corbin faced the Padres.
"I don't know, 541?" Bauer joked when asked how many pitches he threw in the bullpen. "Who knows? I don't know. I threw my normal warmup routine in the first inning and then simulated two innings in the 'pen while Corbin was pitching."
Bauer's routine is heavy on throwing, both long toss and actual pitches. It's something he believes strongly in and doesn't intend on changing.
"Old-time pitchers threw all the time and that's how they developed into Major Leaguers, they just threw," Bauer said. "I always tend to throw better as the game goes along anyway, so that was basically like my third and fourth inning out there in the game. I actually felt more comfortable doing it that way than I would have if I had gone out there for the first time in the first inning. Pretty interesting."
The added throwing in the bullpen didn't seem to hamper Bauer's velocity.
"I saw more velocity out of him today," Gibson said. "I think his arm strength is getting there."
Corbin tends to get less attention than Bauer or fellow top prospect Tyler Skaggs, and that seems to be just fine with him.
"I've never been the guy to be on the radar really," Corbin said. "I'm kind of just coming in here and not expecting much and performing as well as I can. Things will kind of work themselves out. I feel like this organization, if you're throwing well or doing well at your position, they'll give you a chance."
Corbin certainly impressed Gibson on Wednesday.
"Obviously, we could kind of tell that he has some makeup and was prepared for it and he looked like he had a lot of composure from the first pitch," Gibson said.