His senior year he had six touchdowns against the College of Puget Sound (now University of Puget Sound), scoring 36 of the team's 40 points, a UW record for points in a game by a single player. He played for all but six minutes of the 1928 season's six conference games. Stanford's coach, Pop Warner, said he had never seen "a greater football player." Carroll would go on to earn a place in the College Football Hall of Fame, the National Football Foundation Hall of Fame, and was the first inductee to the University of Washington Husky Football Hall of Fame. His jersey, No. 2, is one of only three numbers retired by the University of Washington football program. Former UW wide receiver Kasen Williams was allowed to wear No. 2 in honor of his father, Husky great Aaron Williams, who wore the same number before the university retired it.