Pettitte tossed the ball with CC Sabathia from about 60 feet for five minutes -- long enough for roughly 40 throws. Pettitte said he feels great and he hopes to return ahead of the prescribed four to five weeks.
"I feel good. I'm not having any problems at all," said Pettitte, who suffered the injury in the third inning of Sunday's win over the Rays. "[The four-to-five week diagnosis] doesn't seem realistic at all to me right now, but I haven't been on a mound or strided out."
Pettitte will fly down to Tampa, Fla., on Monday to continue his rehab work and be back with the team when they arrive for a series with the Rays on Friday. Pettitte is eager to start long-tossing as soon as possible so that he doesn't lose much of his arm strength during his DL stint.
"If I can start long-tossing in the next couple days, I don't feel like I'll lose much arm strength at all," Pettitte said.
Manager Joe Girardi isn't quite as optimistic about Pettitte just yet, and he wants to be cautious with his 38-year-old All-Star.
"It's one thing to walk around; it's another thing to have to get off the mound and push. I'm very happy with the progress he's making," Girardi said. "I'll feel a lot better once he starts throwing off a mound and says he feels good.
"If it's less [than four weeks], that's great for us. But whatever it takes, when he comes back, I don't want this to be a reccuring thing."
Pettitte is 11-2 with a 2.88 ERA this season.