Arrieta, like McDonald has really dropped his BB/9 this year from 4.45 in 2011 to 2.23 in 2012.
Unlike McDonald, Arrieta has been touched up with the home run ball at 1.30 per nine.
Basically, if we can get a couple runners on base, Arrieta will likely give up multi-run bombs. If not, he'll give up a few solos here and there, but keep the Birds in it.
I expect EJ to have a good showing tonight.