Hadfield played on the Rangers "GAG Line" (goal-a-game) with Jean Ratelle and Rog Gilbert. He scored at least 20 goals in 9 straight seasons from 1968-76, including a career-high of 50 goals and 106 points in 1972. He also captained the Rangers from 1971-74. The 2x All-Star retired in 1977 with 323 goals, 712 points, and 1,154 penalty minutes.