Joe Nathan blew his fourth save and was slapped with his first loss of the season by allowing two runs without a recording an out in a 3-1 loss to the A's Wednesday. Brad Ausmus gave Anibal Sanchez the opportunity to finish off a shutout in a 1-0 game, but Coco Crisp's double on his 111th pitch prompted Nathan's involvement. The veteran stopper wouldn't be faulted for being sore with Nick Castellanos, who failed to come down with a John Jaso bloop that he should have had, sending Crisp to third. It's possible Castellanos could have doubled off Crisp if he completed the catch. Instead, Nathan hung a breaking ball to Josh Donaldson. Nathan has pitched in consecutive days, so Joba Chamberlain might get a chance if a closer is needed in Oakland on Thursday afternoon.