NEW YORK -- Philadelphia Phillies left-hander J.A. Happ threw a bullpen session Tuesday at Yankee Stadium and is slated for another minor league rehab start Friday, possibly for Double-A Reading again.
Happ, on the disabled list since April 16 with a strained left forearm, pitched for Reading on Sunday.
"As long as he's not feeling any pain, I'm a happy guy," Phillies general manager Ruben Amaro Jr. said before the opener of a three-game series against the New York Yankees. "Now he's in a mode where he's got to build up his arm strength."
Philadelphia shortstop Jimmy Rollins (right calf) went 0-for-3 in his first rehab game for Class-A Clearwater. Amaro said there was a chance Rollins could return to the Phillies this weekend.
"Maybe. That might be a little aggressive. But it's possible," Amaro said.
Amaro also acknowledged that he's spoken recently with the agent for free-agent pitcher Pedro Martinez, who finished last season with the Phillies, but said they're not negotiating.
Amaro said he has no idea whether Martinez has been throwing regularly or is in pitching shape.
The GM also said he's confident his slumping squad will start to hit, and he doesn't plan to make any major moves that would shake up Philadelphia's dangerous lineup.
"This is our team out there. They'll be fine," Amaro said. "Get the guys healthy, we'll be fine."