"Any time you go into a season, you don't expect to lose a guy so quickly," Marlins manager Mike Redmond said. "He is part of that depth we've talked about having. It's nice to have. To lose him, that's a blow. You never know when you're going to need those guys."
The Marlins acquired Crow from the Royals in November. The 28-year-old was an All-Star as a rookie in 2011. In four seasons with Kansas City, Crow was 20-11 with a 3.43 ERA in 254 games.
In Spring Training, Crow was competing for a bullpen spot, and he appeared in seven games and threw eight innings. He last pitched on March 28, and the next morning he experienced pain in his elbow.
An MRI exam taken shortly afterward revealed a ligament tear, and surgery was recommended.
Crow's injury cleared the way for Sam Dyson to make the club, although Dyson may have won the spot anyway.
"I feel bad for him more than anything, because I know he was looking forward to a fresh start with us, and getting a chance to go out and help us win ballgames," Redmond said of Crow. "He's not going to be able to do that."
Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter @JoeFrisaro. This story was not subject to the approval of Major League Baseball or its clubs.