Wuertz will pitch one inning during Sacramento's home opener Friday and will likely appear in a minimum of two games before being removed from the disabled list, manager Bob Geren said.
The A's right-handed reliever, who is on the DL for the first time in his six-year career, is rehabbing from shoulder tendinitis that allowed him to make just two spring outings. The soreness may very well be a result of the workload handed his way last year -- a team-leading 74 appearances.
Meanwhile, Cahill will throw one more bullpen session in Oakland at the end of this week before starting the River Cats' game Monday on a 60-pitch count. The right-handed starter, placed on the DL just two days before Opening Day with a left scapula stress reaction, made 32 starts as a rookie last season.
He won't have an easy time cracking Oakland's rotation at the moment, as A's starters entered Wednesday's rubber match against the Mariners with a 2.62 ERA -- good for second in the American League next to Texas, which boasts a remarkable 1.85 ERA.