The two-time Cy Young Award winner threw 41 pitches for the Indians' Triple-A club in Columbus. He struck out two, walked one and allowed two home runs against the Pawtucket Red Sox. He retired the last five batters he faced.
"I felt good," Kluber told reporters. "I haven't run into anything out of the ordinary yet. That's encouraging."
Kluber threw another 14 pitches in the bullpen after he was pulled from Thursday's game. The 33-year-old expected some rustiness and felt it.
"There's a progression you have to go through when you've been down for a while," Kluber said. "This is another step in that progression, but it's also the last step so to speak. You can see the light at the end of the tunnel. It's fun to get out there and compete."
His next rehab start is expected to be Tuesday.
"Each start you've got to take it by itself and try to separate them from each other so that you can honestly evaluate it and see how I feel, how I felt I executed pitches, that kind of thing," Kluber told reporters. "Then you discuss it with people back in Cleveland and move on to the next step, whatever it is."
The Associated Press contributed to this report.