Hamels is 5-5 with a 2.96 ERA. The three-time All-Star and 2008 World Series MVP is a valuable trade asset for rebuilding Philadelphia, which has the worst record in the majors.
Right-hander Phillippe Aumont will be called up from Triple-A Lehigh Valley to start Philadelphia's game against St. Louis on Friday night instead of Hamels. Aumont was converted to starter this season after struggling as a reliever since the Phillies acquired him from Seattle in the Cliff Lee trade of December 2009. He was 3-4 with a 2.35 ERA in 14 games, including 10 starts for the IronPigs.