Roy Halladay (shoulder) allowed three earned runs over six innings Thursday in his rehab debut. Pitching for the Phillies' affiliate in the Gulf Coast League, the veteran right-hander tossed a total of 87 pitches, yielding six hits and three walks while fanning four. It's possible that Halladay will be allowed to rejoin the Phillies after just one more rehab start. He has been out since undergoing shoulder surgery in mid-May.