What up guys (and gals). . . after watching Ezequiel Astacio give up the long ball on Tuesday, I was thinking about him and a few others and their long term potential.  He seems to have pretty good stuff, and actually gave up a few hits on some decent pitches.  Anyway, just wanted your opinions on a few pitchers who made their debuts this year.  Who do you think will have the best careers or has the best upside of these guys:  Rank, comment, or do whatever you feel like (at least it's not another Brandon Wood diary!!!)

Gustavo Chacin
Hayden Penn
Ezequiel Astacio
Brandon McCarthy
Ervin Santana
Dustin McGowan