Most recently, Spencer has served as the lead studio analyst for CBS Sport’s coverage of College Football Today, in addition to his coverage of CBS’ NCAA Men’s Basketball Tournament. He served as sports anchor for WABC-TV New York from 1997 to 1999, and also spent 10 years as sports anchor for KPRC-TV Houston. He also served as an anchor for the regional broadcasts on Fox Sports Net.

A freshman all-American running back for the University of Oklahoma (1982-86), Spencer was captain of the 1985 national championship team. He was the recipient of many awards, including UPI Player of the Year in the Big Eight Conference in 1982, Big Eight Football Newcomer of the Year in 1983 and most valuable player of the 1987 Orange Bowl. He completed his career with the Sooners with 2,257 yards on 434 carries, for 5.2 yards per carry, ranking him 12th on OU's career rushing list. Spencer was one of just five freshman ever recieve enough qualifying votes for the Heisman trophy.

In 1987, Spencer was drafted by the Houston Oilers. During the seven-month off-season, he honed his skills as an anchor and reporter with KPRC-TV in Houston. A team captain and member of the Houston Oilers for two seasons (1987-88), Tillman was traded to the San Francisco 49ers, where he stayed for three years (1989-91), serving as team captain in 1990. His eight-year NFL career as a running back was highlighted by a Super Bowl championship with the 49ers during the 1989 season. In 1992 he was traded back to Houston, where he completed his football career in 1994. His football and broadcasting careers developed in tandem as he hosted two sports talk radio shows and was a reporter/anchor for radio PM magazine in Oklahoma City prior to his television jobs.

Tillman earned a bachelor's degree in journalism from Oklahoma in 1986 and a second degree in communications in 1988.