Daniel Lee Dierdorf (b. June 29, 1949 at Canton, Ohio) is a former American football player and current television sportscaster. He played 13 NFL seasons and has since been associated with ABC's Monday Night Football and CBS since his retirement.

Born in Canton, Ohio, the birthplace of the NFL, Dierdorf played football at Glenwood High School in Canton then the University of Michigan before being drafted by the St. Louis Cardinals in the first round of the 1971 NFL Draft. At Michigan, Dierdorf was concensus All-American in 1970.

Dierdorf began his career as both a guard and a tackle before settling in as a starter at right tackle in 1973. The following season he was named to his first Pro Bowl team. Over the next six years, Dierdorf was a six time Pro Bowler, he was named All-Pro five times, and he was named lineman of the year by his peers three times.

After his retirement, Dierdorf transitioned to the broadcast booth. He called Cardinals games on radio for KMOX in 1984 before moving to CBS television for two seasons.

In 1987, he was added to the Monday Night Football team. He was named as ABC's blow by blow boxing commentator in 1989, beginning with Meldrick Taylor's first defense of his championship. Dierdorf stayed at ABC for twelve seasons before a shake up after the 1998 season. He was immediately rehired by CBS to broadcast games for the network. As of 2004, Dierdorf is a color commentator with play-by-play announcer Dick Enberg.