The left-hander, who is recovering from left shoulder and elbow fatigue, joined the Rangers in Chicago on Tuesday after tossing six innings in a rehab start for Triple-A Round Rock on Monday.
Holland surrendered three sixth-inning home runs in that outing, but said he used the final inning to work on his sinker, which he said was the only pitch he threw in the sixth.
After Monday's outing, Holland said he believes he's ready to return to the Rangers.
"I feel like I'm ready, but I can't make that call," Holland said. "I'm just telling them that I'm ready to go and it's up to those guys, what they want me to do, and I'm going to be ready for whatever they tell me to do."
Rangers manager Ron Washington said prior to Tuesday's game he and pitching coach Mike Maddux had yet to decide on Saturday's starting pitcher. If it's Holland, right-hander Yu Darvish would move up to start Friday. If Washington and Maddux don't think Holland is ready, left-hander Martin Perez would pitch Friday with Darvish going Saturday.
Washington did say he heard good things about Holland's rehab assignment.
"Had a rough sixth inning, but up until that point, everything was fine, so it's good," Washington said. "Got out of it healthy, got deep into the game and we'll see where he goes from there."
Holland is scheduled to throw his regular between-starts bullpen session on Wednesday, but Washington said how Holland performs won't factor into his decision for Saturday's starter.