Sean Manaea’s simulated game at the A’s minor-league facility Saturday went well and the left-hander might need just one more such game before heading on a rehab assignment.

“If things keep going well, I’m getting close,” Manaea said.

Manaea, who had left shoulder surgery Sept. 19, threw 45 pitches in three innings against Oakland minor-leaguers, many of whom had just signed with the team after this month’s draft. Manaea said he allowed one single and didn’t walk a batter.

“Threw everything for strikes, felt great,” he said. “I was really happy with how everything turned out. There were people in the stands. I did my normal warm-up. It was great. I think I got into a three-ball count once.”

Manager Bob Melvin said the plan is for Manaea to throw one more simulated game of about 60 pitches to make sure he’s comfortable.

“It’s gone according to plan,” Melvin said. “The most important thing is he feels great; after 45 pitches, this is the one, you wonder if there will be some soreness involved, but really not the case today.”

The A’s are likely to get left-handers A.J. Puk (Tommy John surgery) andJesús Luzardo (shoulder strain) back before Manaea. On Sunday with Class A Stockton, Puk threw two innings and allowed a homer and a walk with three strikeouts before giving way to Luzardo, who allowed four hits (including a homer) and struck out nine in a four-inning stint.