Mike Singletary was born in Houston, Texas in October 1958. He was a linebacker who played at Houston Worthing High School.
Singletary played his college football at Baylor where he was a two time Davey O'Brien Memorial Trophy winner, a two time consensus All-American, and a two time Southwest Conference Player of the Year.
In 2008 he was the interim head coach of the 49ers and from 2009 to 2010 he was head coach. In 2008, he signed a 4-year contract with the 49ers that was worth $10 million.