 He also set Michigan records with 2,524 career rushing yards, 19 rushing touchdowns in a season, and 139.1 rushing yards per game in 1968.He played seven seasons in the National Football League (NFL) from 1969 to 1975 and became the first player in New York Giants history to rush for 1,000 yards in a season, accomplishing the feat in both 1970 and 1972.He also led the NFL in rushing attempts in both 1970 and 1972.