SANTA CLARA, Calif. — Denver Broncos offensive coordinator Rick Dennison interviewed with the San Francisco 49ers on Monday to run their offense.

He's the fourth coach to interview for the job on Mike Singletary's staff that was vacated when Mike Martz was fired last month.

Dennison was an assistant to former Broncos coach Mike Shanahan for 14 years, also coaching the offensive line. He won't be retained on new Denver coach Josh McDaniels' staff, but his interview with San Francisco was set up before Shanahan was fired.

Former St. Louis coach Scott Linehan, Indianapolis receivers coach Clyde Christensen and Cleveland offensive coordinator Rob Chudzinski already have interviewed with Singletary.