Designated hitter Erubiel Durazo will undergo season-ending surgery on his left elbow, and is expected to be sidelined an additional nine to 12 months. The procedure, known as Tommy John surgery, will be performed on Friday by Angels team physician Dr. Lewis Yocum in Los Angeles. Durazo underwent an MRI that revealed the damage, which was initially diagnosed as tendinitis. Durazo, 30, has been out of the lineup since May 25. He was hitting .237 with four homers and 16 RBI in 41 games before going on the disabled list for the seventh time in his career. Last season, his second with the A's, he had 22 homers, 88 RBI and a career-best .321 average -- the fifth-highest ever by a DH with a minimum of 500 at-bats.