Because seeing him get knocked around in Chase Field would be fun? Hernandez was 9-12 with a 5.44 ERA and 1.56 WHIP in 31 starts between the Mets and Nationals in 2009, but was a member of the Diamondbacks from 2006-07. Piecoro notes that Hernandez would be brought in more for his potential role in the clubhouse than his performance on the field. If signed, he would compete with Billy Buckner, Bryan Augenstein and Kevin Mulvey to lock down the back-end of the starting rotation.