He is the worst, although Tim Timmons has been horrible this year. When Mike Scoscia gets tossed for arguing balls and strikes, you know you aren't doing a good job as ump...
I still rate Dreckman the worst, then Laz "Strike Zone du Pitch" Diaz, and Gordon. Hernandez is at least consistent with a bad zone, the others you never know since they are so inconsistent. Hernandez was a crappy HS ump down here, and hasn't improved. I have no idea how a guy with such bad fundamentals became an MLB ump.