The left-hander's workout takes the place of what would have been his final outing of the regular season, ensuring he will finish the year 19-8 with a 3.00 ERA in 33 starts.
"I feel good. My arm feels great, body feels great," Sabathia said. "I'm pretty much ready to go."
Sabathia said it was a little odd to be getting ready for the playoffs without facing another club, instead pitching to teammates Chris Dickerson, Greg Golson and Ramiro Pena, but he was OK with it.
"I was able to work on a few things and have it not be as intense, and I can get my work in," Sabathia said.
Yankees manager Joe Girardi said that they did not want to risk injury to Sabathia, pitching him on short rest to line him up for Game 1, and felt they could better control the circumstances under simulated conditions.
"Obviously our idea was to get him ready for the postseason," Girardi said. "There's a lot clubs that have to fight near the end to get there and then, when they get there, they change their plans.
"That's what happened to us, we changed our plans. If we needed CC, we were going to use him. I didn't feel good about taking a chance."