"I'm antsy," Pettitte said. "You wanna work. If you're not able to pitch, you wanna be able to go for a run, but I'm just trying to be patient and try to stay in shape."
Pettitte, who returned to New York on Thursday night, got his ankle taped by the trainers, threw on flat ground prior to Friday night's Yankees-Los Angeles Angels game at Yankee Stadium and felt no discomfort.
"I'm feeling good. Getting better. Getting to throw. It's good to be back with the team," Pettitte said. "It feels 100 percent better than it has been."
Pettitte said his six-week timetable on coming back remains the same, and he's targeting Sept. 1 for his return. Pettitte wonders about how he'll be stamina-wise as he continues his rehab.
"I'm kinda back to square one," Pettitte said. "I really don't know how I'm gonna react. It's just good to throw curveballs in the outfield to (pitching coach) Larry Rothschild and spinning my cutter just to try to keep the feel of everything."
Pettitte fractured his ankle June 27 when he was struck by a line drive off the bat of Cleveland Indians first baseman Casey Kotchman. He has been on the disabled list since and plans on being with the team for the time being.
Pettitte, 40, is 3-3 with a 3.22 ERA in nine starts for the Yankees this season.
"I think he's bored to death, but it's something he's gotta work through," Yankees manager Joe Girardi said.
Girardi said left-hander CC Sabathia, on the disabled list with a strained muscle in his left leg, threw a simulated game Friday.
"If he feels good Saturday, our plan is to pitch him on Tuesday," Girardi said.
If Sabathia does pitch Tuesday, he will be on a more limited pitch count.
"I wouldn't expect to throw him 110-115," Girardi said.
Girardi said left fielder Brett Gardner (right elbow strain) will take batting practice Friday and Saturday, then play a simulated game Sunday.
Girardi confirmed that the Yankees have signed outfielder Kosuke Fukudome to a minor-league contract, and he will report to Triple-A Scranton/Wilkes-Barre.
Right-hander Joba Chamberlain will throw two innings for the Gulf Coast League Yankees on Saturday.
The Yankees figure Chamberlain (Tommy John surgery) still needs a month more of rehab, but if he's ready in less time than that, "we'll bring him back quicker," Girardi said.
Mike Mazzeo is a regular contributor to ESPNNewYork.com.