Marshall was drafted in the fourth round by the Cleveland Browns in 1960 out of Ohio State. He was traded to the Minnesota Vikings after his rookie year and stayed for the duration of his career (1961-1979). He joined fellow linemen Carl Eller, Gary Larsen and Alan Page to form the vaunted Purple People Eaters, one of the top defensive units of their era in the NFL. He started at DE in 4 Super Bowls (IV, VIII, IX, XI) and 2 Pro Bowls (1968 and 1969). He led or tied for team lead in sacks in each of the Vikings first 6 seasons (1961-1966). He ranks 1st in NFL history with 282 consecutive games played and started, 270 of those are from the Vikings. The fierce Defensive End ranks 2nd in Vikings history with 127 sacks. He was inducted into the Vikings Ring of Honor on November 28, 1999.