PHILADELPHIA -- J.A. Happ said he is ready to rejoin Philadelphia's rotation, but the Phillies aren't sure.

Happ, who has not pitched with the Phillies since April because of a strained left forearm, made his sixth rehab start on Sunday with Triple-A Lehigh Valley. He is 1-1 with a 6.93 ERA in those starts. He said he is healthy and feels good. But Phillies manager Charlie Manuel said on Monday, the next step "would be getting him to 100 percent. Do I think he's there? From the sound of what they're telling me, it sounds like he still might need some work."

Happ must complete his rehab assignment by Wednesday. If the Phillies decide he is not ready to rejoin the rotation they could apply for an extension for his rehab. They also could activate him from the 15-day disabled list and option him to Lehigh Valley until he is ready.

"I'm ready to go," Happ said. "I've felt good the last couple starts. The results aren't spectacular, but they rarely are in these circumstances. I feel good to go. I'm ready. I don't really have much else to say about it."

Happ likely would replace right-hander Kyle Kendrick in the rotation. Kendrick is 5-3 with a 4.76 ERA. He has been inconsistent, but with just seven games before the All-Star break, the Phillies could have Happ pitch in the Minors and bring him back after the break.

Improving Schneider could play Tuesday

PHILADELPHIA -- Phillies catcher Brian Schneider, who has not played since Friday because of a sprained left thumb, said he has improved. He said there is a chance he could play Tuesday.

Schneider took batting practice Monday and he said he would try to catch a bullpen session Tuesday.

Madson begins rehab assignment

PHILADELPHIA -- Phillies right-hander Ryan Madson, who has been out since May with a broken right big toe, threw two-thirds of an inning in a rehab appearance on Monday for Triple-A Lehigh Valley.

He allowed one run on one hit and two walks before leaving the game.

Madson also is scheduled to pitch Tuesday. He could be back before the All-Star break.

Contreras enduring rough stretch

PHILADELPHIA -- Jose Contreras looked like a savior for the Phillies earlier this season with Brad Lidge, Ryan Madson and J.C. Romero on the disabled list.

He went 3-2 with a 1.23 ERA and three saves through his first 25 appearances. He had struck out 28 in 22 innings, and opponents had hit just .200 against him. But Contreras is 0-1 with an 18.00 ERA in his previous five appearances.

"He's not showing the arm strength that he had earlier," Phillies pitching coach Rich Dubee said. "He's throwing 92. The splitter hasn't been there. The aggressiveness in his delivery seems slower. He's sluggish."

Dubee wouldn't offer an explanation why -- Contreras, 38, has never pitched an entire season out of the bullpen before -- but said he thinks it is just a rough stretch.