The Atlanta Braves placed relief pitcher Luke Jackson (elbow) on the 60-day injured list with a torn right ulnar collateral ligament on Sunday. In corresponding moves, the Braves selected reliever Darren O'Day's contract and optioned left-hander Kyle Muller to Triple-A Gwinnett. Jackson, who was outstanding for the Braves in a setup role last year during the regular season, will likely need to undergo Tommy John surgery, which will keep him out for all of this year and likely the beginning of...