William Lawrence Muschamp[1] (born August 3, 1971) is an American football coach and former player who is a defensive analyst at the University of Georgia.

[2][3] In his second season as defensive coordinator at Auburn, Muschamp was a finalist for the 2007 Broyles Award for the most outstanding assistant coach in college football.

As an undergraduate, he was initiated into the Kappa Alpha Order (Gamma chapter) and also earned a spot on the SEC Academic Honor Roll in 1993.

[6] While at LSU, Muschamp coached four All-Americans including Bradie James, Chad Lavalais, Corey Webster and Marcus Spears.

Muschamp left LSU with Saban after the 2004 season to join the Miami Dolphins staff as the assistant head coach.

When the Auburn defensive coordinator position became available in January 2006, Muschamp took the opportunity to return to the college game.

Muschamp was slated to receive a raise to $425,000 per year with a two-year, no buyout, contract at Auburn for 2008, which would have made him the highest-paid assistant coach in the SEC.

[18] Muschamp received a contract with a $425,000 annual salary at Texas, making him the highest-paid assistant coach in the Big 12.

The Horns have held all of their Big 12 opponents below their season scoring average and limited six foes to 14 points or less.

"[20] UT Athletics Director DeLoss Dodds said, "With the landscape in college football and all of the changes around the country, I've been looking at this for the last couple of years.

Mack has provided outstanding leadership and continues to elevate our football program to a level as high as anyone in the country.

"[20] Prior to this announcement, Muschamp had been mentioned in association with head coaching job openings at Clemson, Tennessee, Washington, and Auburn.

[7] He had been planning an off-week interview with Clemson[24] but as a result of this deal decided instead to wait his turn at Texas, saying, "This is a special place.

Muschamp lost to traditional rival Georgia for the third consecutive year, and a 30-point loss to Florida State in the season's final game dropped his record against the Seminoles to 1–2.

Florida, a 10-point underdog started true freshman Treon Harris, who threw the ball only six times.

However, after a 23–20 overtime home loss to South Carolina two weeks later on November 16, 2014, Foley announced that Muschamp would be stepping down following the conclusion of the 2014 regular season.

"[26] On December 12, 2014, a week after the end of the regular season, Muschamp became defensive coordinator for the Auburn Tigers.

Offensive coordinator Mike Bobo replaced him as interim head coach with three games left in the season.

[31] On February 3, 2021, Georgia head coach Kirby Smart announced that Muschamp had been hired as a defensive analyst.

Following the departure of Dan Lanning to become the head coach of the Oregon Ducks, Muschamp was promoted to co-defensive coordinator of the Bulldogs, alongside Glenn Schumann.

[33] He won his second title with the Georgia coaching staff, and third overall, when they defeated TCU in the National Championship.

[34] On January 13, 2024, Georgia announced that Muschamp would transition to an off-field analyst role to spend more time with his family.

[35] Travaris Robinson, who served on Muschamp's staff at Florida and South Carolina, was named as his replacement the same day.

His brother Mike Muschamp is the head football coach at The Lovett School in Atlanta; he led the team to a state championship in 2013.