MLB Trade Rumors Marlins first baseman/corner outfielder Garrett Cooper has been diagnosed with a torn UCL in his left elbow, reports Craig Mish of the Miami Herald (Twitter link). He’ll undergo season-ending surgery to correct the issue. Mish suggests it’s the same procedure Phillies first baseman Rhys Hoskins underwent last October. Hoskins was ready for the start of the 2021 season, so Cooper (who’ll go under the knife two months earlier in the year) should have no trouble being at full health for 2022. That said, losing Cooper for the rest of this season is still a difficult blow. While Miami isn’t going to the postseason this year, the right-handed hitting Cooper had played well enough to be a plausible trade candidate. He’ll wrap up the campaign with a .284/.380/.465 line over 250 plate appearances. Cooper has always performed well when healthy, but he’s been plagued by a series of injuries over the course of his career.