Dan Dierdorf returned to CBS Sports in 1999 as a game analyst for the CBS Television Network's coverage of THE NFL ON CBS after having served as an analyst for ABC Sports' "Monday Night Football." For the 2004 NFL season, Dierdorf, who was inducted into the Pro Football Hall of Fame in 1996, will once again team with Dick Enberg.

The former NFL All-Pro tackle had been a play-by-play announcer for CBS Sports' NFL broadcasts in 1985 before switching to color analysis in 1986. He is a three-time Emmy Award nominee (1987, 1988, 1989) as Outstanding Sports Analyst.

For nine years, Dierdorf was blow-by-blow announcer for ABC Sports' coverage of boxing. His extensive broadcasting experience also includes serving for 16 years as sportscaster for KMOX Radio in St. Louis in a variety of capacities.

In 1984, he served as color analyst for KMOX Radio's coverage of the St. Louis Cardinals, announced NFL games for the CBS Radio Network and provided color commentary for radio broadcasts of the NHL's St. Louis Blues. Dierdorf also served as sports director for KMOV-TV St. Louis.

During a 13-year career with the St. Louis Cardinals (1971-83), Dierdorf was named All-Pro six times, was selected as the NFL's top offensive lineman three times and was voted to the NFL Team of the Decade for the 1970s.

He was a two-time All-Big Ten tackle at the University of Michigan, where he was inducted into the school's Hall of Fame and named to seven All-American teams as a senior. Dierdorf was inducted into the College Football Hall of Fame in 2000. He was also inducted into the State of Missouri Hall of Fame. In 2001, he was inducted into the State of Michigan Sports Hall of Fame.

Dierdorf has served for 19 years on the Board of Trustees of Cardinal Glennon Children's Hospital in St. Louis, which includes an emergency and trauma center named in his honor, and for 24 years on the board of the Cystic Fibrosis Foundation's St. Louis Chapter.

Dierdorf was born on June 29, 1949, in Canton, Ohio. He and his wife, Debbie, live in St. Louis and are the parents of four children.