To follow up on Christian's report below: Just looking through my daily Baseball America Prospect Report email, I'm pleased to see that several of the Cubs' top pitching prospects had excellent outings yesterday:

TM  PITCHERS             IP   H   R  ER  BB   K   ERA
CHC B.Brownlie (W,1-0)  5.0   3   1   1   1   7   1.80
CHC A.Sisco (L,0-1)     6.0   7   2   1   1   5   1.50
CHC S.Marshall (W,1-0)  6.0   3   0   0   0   7   0.00

I think Brownlie is often overlooked a bit in the Cubs system. While health has been a concern to this point in his Cubs career, I could see him taking off and challenging Angel Guzman's status as "can't miss callup".