The Phillies promoted top prospect Carlos Carrasco to Triple-A Lehigh Valley prior to Saturday's major league game in St. Louis.

The 21-year-old right-hander was 7-7 with a 4.32 ERA in 20 games (19 starts) at Double-A Reading this season. Carrasco, the rated the organization's top prospect in each of the last two years by Baseball America, has struck out 109 while walking 45 in 114 2/3 innings this year.