Tyson Ross surrendered six runs -- three earned -- in 4 1/3 innings Friday in a loss to the Yankees.
Athletics manager Bob Melvin said Friday there's a ''good possibility'' Yoenis Cespedes (hand) will need a rehab assignment.
Brandon McCarthy (shoulder) resumed throwing on Friday.
Yoenis Cespedes (hand) took 28 swings in the batting cage Friday.
Brandon Inge (groin) will begin a minor league rehab assignment Friday with Triple-A Sacramento.
Yoenis Cespedes will change the way he grips a bat in time for his return from the disabled list.
Athletics manager Bob Melvin said Yoenis Cespedes (hand) felt good during a session in the batting cage Wednesday.
Jarrod Parker wasn't involved in the decision after allowing one run in seven innings and striking out eight Angels on Wednesday.
Athletics manager Bob Melvin said Wednesday that the team is not "locked into" activating Manny Ramirez on May 30.
Brandon Inge (groin) did 14-15 sprints on Tuesday and is scheduled to do more running Wednesday.
Graham Godfrey (finger) was told that he should be fine for his next scheduled start.
Collin Cowgill went 0-for-4 in Tuesday's 5-0 loss to the Angels.
Graham Godfrey gave up four runs in three innings to take a loss to the Angels Tuesday in his return to the majors.
Jemile Weeks, Kurt Suzuki and Josh Reddick are all out of the Athletics' lineup Tuesday.
Dallas Braden (shoulder) has currently halted his throwing program.