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Chicago outfielder Kyle Schwarber will miss the rest of the season with a knee injury, according to ESPN Chicago's Jesse Rogers.
The catcher and outfielder was diagnosed with a torn ACL and LCL in his left knee Friday night.
During the Cubs' 14-6 win over the Rockies on Thursday, Schwarber collided with Dexter Fowler in center field. Both players were in pursuit of a line drive, but Fowler hit Schwarber's legs.
While the Cubs told reporters X-rays were negative, Rogers noted Thursday, an MRI revealed the structural damage.
Schwarber, 23, is a member of the Cubs' young core and was set to get his first start of the season behind the plate Friday. He was split time with Jorge Soler, since the Cubs signed Jason Heyward and re-signed Fowler.
He batted .246 to complement 16 home runs and 43 RBIs last season and was expected to be an integral part of the Cubs offense.
The Cubs have several options beyond Soler in left. Kris Bryant and Matt Szczur could also see time in Chicago's outfield.
When the Cubs added Fowler, they traded lefty Chris Coghlan to the Athletics. Coghlan could have been a platoon option against right-handed pitchers.
Chicago selected Schwarber with the fourth overall pick in 2014.