Gregg will undergo season-ending surgery to remove bone chips from his elbow, Joe Frisaro of MLB.com reports. Gregg was forced out of action last month with what was labeled elbow inflammation, but it's been determined that he needs arthroscopic surgery, and he'll miss the rest of the 2014 campaign as a result. The 36-year-old gave up 10 runs on 11 hits in just nine innings with the Marlins, and he'll almost certainly have to settle for another minor league deal in the offseason.