Zito will only pitch in relief for the A's, Susan Slusser of the San Francisco Chronicle reports.

EDGE Analysis

Zito's contract was selected from Triple-A Nashville on Wednesday, but the veteran hurler will only be used out of the bullpen as the season comes to a close. The 37-year-old, who is expected to retire at season's end, has not been stretched out as a starter, but he could be used in long relief.