Piazza to go part-time as catcher

The A's want Mike Piazza to rotate between catcher and DH after he returns from his sprained right shoulder.

Oakland plans to keep Jack Cust, who has gone 4-for-35 with no homers since the 19th of May and to rotate Piazza in the DH.

Jason Kendall, the A's regular catcher, has a .446 on-base which is the lowest in the majors.