He began his broadcasting career as sports anchor for WFAA in Dallas and in Austin for KTBC, as well as being the radio voice of the Dallas Cowboys. Lundquist joined the Cowboys Radio Network in 1967 and remained with the team until the 1984 season. He was paired with future (and now current) play-by-play man Brad Sham starting with the 1977 season, the year the Cowboys went 12–2 and captured their second NFL title in Super Bowl XII.
Nationally, Lundquist worked for ABC Sports from 1974–81, then moved to CBS (1982–95) and TNT cable (1995–97) before returning to CBS in 1998.
Lundquist played himself commentating on tournaments in the 1996 motion pictureHappy Gilmore. Lundquist was a play-by-play announcer in the NBA Live '98 video game and was also the play-by-play announcer in the College Hoops 2K8 video game. A famous pet phrase Lundquist uses on occasion is "How, do you DO!"; on a huge offensive or defensive play, a phrase he took from USC football broadcaster Pete Arbogast (who in turn took the phrase from venerable broadcaster Vin Scully). Lundquist also often exclaims "Oh My Gosh!" or "Oh My Goodness!" Lundquist filled in for Ernie Johnson Jr. as host of TNT's coverage of the PGA Championship twice, in 2006 as Johnson was battling cancer, and in 2011 when Johnson left after the second round following the death of his father on that Friday night.
Fourth-and-18 … lets it GO … OH MY GOSH! OH MY GOSH! OH NO! Ricardo Louis! Talk about a Hail Mary.
November 30, 2013: While calling a college football game on CBS between #1-ranked Alabama and #4-ranked Auburn, a fierce in-state rivalry known as "The Iron Bowl," Auburn cornerback Chris Davis returned a missed 57-yard field goal attempt by Alabama placekicker Adam Griffith with 0:01 remaining 100 yards for a game-winning touchdown on the game's final play that gave Auburn a 34-28 victory. Lundquist described the play on YouTube:
On the way … No, returned by Chris Davis. Davis goes left, Davis gets a block, Davis has another block! Chris Davis! No flags! Touchdown, Auburn! An answered prayer!