The Philadelphia Phillies activated pitcher day disabled list on Monday.

Hamels landed on the DL last Tuesday with left shoulder inflammation, although the move was retroactive to August 13 -- the day after his last start.

A 2011 NL All-Star selection, Hamels has a record of 13-7 with a 2.62 ERA in 25 starts with the Phillies this season.

He is scheduled to start the team's series opener in Cincinnati on Monday.

Infielder/outfielder Pete Orr, who was called up when Hamels went on the DL, was optioned back to Triple-A Lehigh Valley. He made three pinch-hit appearances during Philadelphia's recent homestand.

In 32 games with the Phillies this season, Orr has hit .227 with three RBI.