Pettitte, who threw a successful inning against the Mets on Wednesday in the Yankees' spring training finale, threw a scheduled 45-pitch bullpen sesison without incident Friday morning at the Yankees' facility in Tampa.
Joe Girardi said he ran into Pettitte in a Tampa restaurant Thursday night and the 39-year-old lefty told him his arm "felt great.''
The Yankees have yet to determine how many extended spring training starts Pettitte will need before being added to the roster, but the general rule of thumb is five or six.
Also, right-hander Michael Pineda, who is starting the season on the disabled list because of right shoulder tendinitis, played catch for the second straight day and is to throw from distance Saturday.
Girardi said Pineda is not expected to throw off a mound in the coming week and will be sidelined at least through April.
Reliever David Aardsma, coming back from elbow-ligament replacement surgery, made 22 throws during his first session on a 5-inch half-mound.
Information from The Associated Press was used in this report.