SEATTLE -- Left-handed reliever Oliver Perez has been selected by the Seattle Mariners while right-handed reliever Steve Delabar was optioned to Triple-A Tacoma.

Seattle made the moves before Saturday's game against San Francisco. To clear a spot on the 40-man roster, the Mariners designate for assignment minor league outfielder Chih-Hsien Chiang.

Perez was 2-2 with a 4.65 ERA and one save win 22 relief appearances with Tacoma. Perez has spent nine seasons in the majors, but has not appeared in a major league game since Oct. 3, 2010 with the New York Mets. Perez spent the entire 2011 season pitching in the Washington Nationals minor league system.

Delabar is headed back to Tacoma after a brief return to Seattle. Delabar was recalled on June 13 after Stephen Pryor went on the disabled list and made one appearance.