Russ Cochran withdrew from the 2012 U.S. Senior Open Championship on Saturday because of a back injury. 

Cochran, the 2011 Senior British Open champion, was tied for 32nd heading into the third round of the U.S. Senior Open with a 36-hole score of 141. He shot rounds of 68 and 73. 

Cochran was scheduled to tee off at 11 a.m. EDT on Saturday from the first tee with Kiyoshi Murota. 

Note: Dave Zink, the head professional at Indianwood Golf and Country Club, will play as a marker with Kiyoshi Murota. Zink attempted to qualify for this year’s U.S. Senior Open in Ann Arbor, Mich. sectional play.