After his college career, Carson was drafted in the fourth round of the 1976 NFL Draft by the Giants. He spent all of his 13 seasons with them, leading the team in tackles for five seasons, and more impressively, served as their captain for ten. Carson was a member of the Crunch Bunch, a team of fierce linebackers composed of Carson, Brad Van Pelt, Brian Kelley, and Lawrence Taylor. The group is widely considered one of the best defensive combos in NFL history. He was a member of the Big Blue Wrecking Crew defense and also made nine Pro Bowl appearances (1978–1979, 1981–1987) in his career. In the 1980s he was joined by Lawrence Taylor, another Pro Football Hall of Fame linebacker. In his 13 seasons, Carson intercepted 11 passes and returned them for a total of 212 yards. He also recovered 14 fumbles, returning them for 36 yards and one touchdown. Officially, he recorded eight quarterback sacks (sacks did not become an official NFL statistic until 1982) but his total is 19 sacks when the 1976–81 seasons are included. He retired at the end of the 1988 season, two years after helping the team win Super Bowl XXI, the Giants' first, and Carson had seven tackles for the victors.