Marlins reliever Aaron Crow needs Tommy John surgery

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Aaron Crow, whom the Marlins acquired from the Royals in November, has been diagnosed with a torn ulnar collateral ligament in his elbow and is expected to undergo season-ending Tommy John surgery.

Miami gave up left-hander Brian Flynn and minor leaguer Reid Redman to get Crow, penciling him into a setup role after he logged 234 innings with a 3.43 ERA for Kansas City from 2011-2014.

However, he showed major signs of decline last season as his strikeout rate fell from 9.0 per nine innings from 2011-2013 to 5.2 per nine innings and his ERA rose to a career-worst 4.12. Crow will earn $2 million this season remains arbitration eligible and under the Marlins’ control for 2016.