I'd say that Milone's numbers are better than "borderline 5th starter". He's a lifetime 99 ERA+ pitcher (better than Hughes, Santana, or Nolasco for that matter) and this year's numbers are the best on the team, although only 53.2 innings. He was terrible last year in five late starts, but his BB% is back to normal, and he continues to sit at about 6 Ks per game. He's allowed less than a hit per inning pitched. Milone doesn't throw hard, but he isn't Jamey Moyer either. He is only 28 years old and under team control for several more years. Since there aren't any other lefties in the rotation, I think his leftiness is an advantage as well.