Angels: RHP Garrett Richards underwent surgery to repair the torn patellar tendon in his left knee. Scioscia said Richards' surgery "went as expected." He added that the timetable for Richards' recovery remains six to nine months.
Athletics: OF Craig Gentry (broken right hand) was reinstated from the 15-day disabled list. RHP Dan Otero was optioned to Triple-A Sacramento. ... First baseman Kyle Blanks is having pain in both feet and his lower legs so the team scheduled him for an MRI.
Angels: LHP C.J. Wilson (10-8) is 4-0 with a 2.60 ERA in five starts against the A's last season.
Athletics: LHP Jon Lester (13-8) looks to bounce back from his first loss in an Oakland uniform and his first defeat since June 7 while with Boston.
The Associated Press contributed to this report.