3. Zack Greinke
Zack Greinke hasn’t had an ERA+ under the league-average of 100 since 2005– his second year in the Bigs. He’s at 81 this season. The Diamondbacks won’t be hitting much without Peralta, so the rotation, which has a 4.89 ERA so far, is going to need to step its game up. This starts with the $206.5-million man.