Nobody wants to be in the Colorado Rockies' rotation. And, even if someone did, the baseball gods won't allow it.

Rockies right-handed pitching prospect Eddie Butler, who entered Monday a near sure thing to start the season in the rotation, left the club's Cactus League game against the Oakland Athletics after just one inning with right shoulder fatigue, according to Patrick Saunders of The Denver Post. Butler struggled in the inning, allowing a run on a pair of walks and two hits. He was replaced by reliever Scott Oberg.

Butler came into the day with a 2.63 ERA in 13⅔ innings. The 24-year-old rookie walked only three batters and struck out eight during that time.

The Rockies were likely close to penciling Butler into either the No. 3 or No. 5 spot in the rotation following injuries to Jorge De La Rosa and David Hale, both of whom will be unable to start the season on time. Fellow highly touted pitching prospect Jon Gray had a lot of momentum behind him as a potential rotation option to begin the season, but he was torched for six runs in just two-thirds of an inning on Saturday and came away from the start with a minor groin injury.

That leaves Christian Bergman, who was shelled on Sunday in Mexico against the Arizona Diamondbacks, and Chad Bettis next in line. Bettis was optioned to the minors earlier this spring but, unlike Gray, is already on the 40-man roster and would be an easy call-up.