Feldman has been on the disabled list since the beginning of Spring Training, after undergoing microfracture surgery on his right knee on Nov. 3, 2010. Feldman is 3-1 with a 4.03 ERA in nine starts in the Minors.
If the Rangers move Feldman to the bullpen, it would likely force them to option reliever Yoshinori Tateyama back to Triple-A. Feldman would fill the role of long/middle reliever with Darren O'Day, Tommy Hunter and Mark Lowe serving as the right-handed setup relievers.
Feldman was the Rangers' Pitcher of the Year in 2009, when he went 17-8 with a 4.08 ERA. But he slipped to 7-11 with a 5.48 ERA last season, while spending time on the disabled list with a bone bruise in his right knee.