McNair, a former NFL running back and assistant coach, served as running backs coach at the University of Southern California for six seasons (2004-09), while also serving as USC's special teams coordinator for four years (2005-08). Under McNair, Trojans running backs amassed more than 1,000 yards from scrimmage six times and, in 2005, became the first unit in school history to see a pair of runners eclipse 1,000 yards rushing in a season (Reggie Bush and LenDale White). That year, with USC running backs averaging a national-best 6.4 yards per carry, Bush won the Heisman Trophy and Doak Walker Award, was a unanimous All-American, and was voted the Associated Press Player of the Year, the Walter Camp Player of the Year and the Pac-10 Offensive Player of the Year.

McNair, a former NFL running back and assistant coach, served as running backs coach at the University of Southern California for six seasons (2004-09), while also serving as USC's special teams coordinator for four years (2005-08). Under McNair, Trojans running backs amassed more than 1,000 yards from scrimmage six times and, in 2005, became the first unit in school history to see a pair of runners eclipse 1,000 yards rushing in a season (Reggie Bush and LenDale White). That year, with USC running backs averaging a national-best 6.4 yards per carry, Bush won the Heisman Trophy and Doak Walker Award, was a unanimous All-American, and was voted the Associated Press Player of the Year, the Walter Camp Player of the Year and the Pac-10 Offensive Player of the Year.

Prior to his time at USC, McNair spent three seasons (2001-03) coaching running backs for the Cleveland Browns. McNair began his coaching career as the offensive coordinator at Camden (N.J.) High School from 1998-99 before handling similar duties at Schalick High School in Pittsgrove, N.J., in 2000. 

McNair played eight years in the NFL as a running back and special teams standout, first with the Kansas City Chiefs (1989-93), followed by two seasons with the Houston Oilers (1994-95) before returning to Kansas City in 1996. In his NFL career, McNair rushed for 803 yards with three touchdowns and caught 254 passes for 2,435 yards and seven touchdowns. 

McNair lettered four years (1985-88) as a running back at Temple, where he was a 1987 All-American honorable mention selection. He completed his college career third on the school's all-time rushing list with 2,383 yards and 16 TDs.