Jeremy Horst and Phillippe Aumont are struggling in the backend of the Phillies' bullpen. Meanwhile, one minor leaguer — Jesse Biddle — is on a tear for the Reading Fightin' Phils.Biddle was recently named Eastern League pitcher of the week after two double-digit, strikeout performances. The Phils have always been very methodical about calling up prospects too soon, but fans are taking notice.Last Monday, Biddle retired the first 19 batters he faced in a 3-2 win. He finished with 16 strikeouts, while allowing two walks and a hit in seven innings. On Sunday, he followed that up with six innings of one-hit ball, including 10 strikeouts. He got a no-decision in that one.