Michael Wuertz to the DL; Tyson Ross up
I have nothing much to add about Tyson Ross coming up to replace the injured Michael Wuertz, who has not pitched yet this year and is apparently dealing with a hamstring problem. Ross is an adequate last man (or second-to-last, since I simply refuse to believe that he's worse than Bobby Cramer) in the bullpen and can be trusted with low-leverage situations where a walk or two won't kill you.
This leaves the A's bullpen this way, ranked from highest leverage to lowest, i.e. who I trust most with the toughest situations:
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