MIAMI -- For one more day, Patrick Corbin had to be a fan.
On Monday, the D-backs left-hander gets to be a big leaguer for the first time.
Corbin will start for the D-backs in place of Josh Collmenter in Monday's series finale with the Marlins, but because the club was holding off on making a roster move until after Sunday's game, Corbin couldn't be in the dugout.
The D-backs made that move Monday morning when they optioned right-hander Joe Martinez to Triple-A Reno. They also transferred infielder Geoff Blum from the 15-day to the 60-day disabled list.
So Corbin got to say hi to his teammates and see his uniform hanging in his locker, but he'll have to wait to put it on.
"He'll probably sit in the stands and watch the game today, and tomorrow's show time," D-backs manager Kirk Gibson said. "It's a very exciting time whenever you're making your Major League debut. It's what you dream about, it's what you work hard for. It's what you earn, you earn the opportunity."
Corbin got the opportunity thanks to a strong Spring Training and a 1.67 ERA through his first four starts at Double-A Mobile.
Collmenter, 0-2 with a 9.82 ERA in four stars, will be moved to the bullpen.