Re: Bronson Arroyo
I have zero faith in Contreras. I think he will get roughed up pretty bad in between quality outings. Furthermore, Arroyo has only walked 10 batters in 41.2 innings, while striking out 31. Pretty solid, so here is the coin toss.
I would go with Contreras if you can afford some damage to your ratios, but I think Arroyo will put up a solid K numbers the rest of the season, and help in the other cats.