Feliz, who will undergo further evaluation, went on the disabled list in mid-May because of an inflamed ulnar collateral ligament and was later moved to the 60-day DL.
Feliz was making his fourth rehab start (third in Triple-A) in hopes of returning to the Rangers either after Sunday's start or following one more outing. He allowed a hit and a walk with three strikeouts over three innings pitched in his last start Tuesday and was set to increase his workload Sunday at Memphis.
The Rangers were stretching Feliz out to be a starter again before determining how to slot their internal rotation candidates. But they stretched out Alexi Ogando on Friday -- he threw 44 pitches in 2 2/3 innings -- with the idea that he could slide into the rotation if they didn't acquire a pitcher prior to Tuesday's trade deadline.
Feliz, 24, is 3-1 with a 3.16 ERA in eight games (seven starts) this season for Texas in just 42 2/3 innings. The former closer and 2010 AL Rookie of the Year was attempting to make the transition from the bullpen to the starting rotation.