Question: Which NFL coach served as a linebackers coach for the San Francisco 49ers before being named interim head coach in their 60th season in the NFL?
Sentence (from "2009 San Francisco 49ers season"): The 2009 San Francisco 49ers season was the franchise's 64th season, 60th in the National Football League, and the first full year with Mike Singletary as head coach after being named interim head coach in 2008.
Relevant evidence: Yes