"I think there's always that possibility that a player may not make it back, but I feel pretty good about what he's had done so far and the steps that were taken," Girardi said. "You just kind of keep your fingers crossed."
Sabathia is 3-4 with a 5.28 ERA in eight starts this season, surrendering 10 home runs in 46 innings.
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.