| Regular Season | Playoffs | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | Lge | GP | G | A | Pts | PIM | +/- | GP | G | A | Pts | PIM |
| 1973-74 | Toronto Marlboros | OHA | 69 | 18 | 37 | 55 | 62 | ||||||
| 1974-75 | Toronto Marlboros | OHA | 70 | 49 | 86 | 135 | 85 | ||||||
| 1975-76 | Houston Aeros | WHA | 79 | 17 | 14 | 31 | 66 | 17 | 7 | 7 | 14 | 18 | |
| 1976-77 | Houston Aeros | WHA | 80 | 24 | 31 | 55 | 109 | 11 | 3 | 4 | 7 | 12 | |
| 1977-78 | Houston Aeros | WHA | 65 | 23 | 41 | 64 | 103 | 6 | 1 | 3 | 4 | 8 | |
| 1978-79 | New York Islanders | NHL | 73 | 17 | 39 | 56 | 44 | 29 | 10 | 1 | 6 | 7 | 0 |
| 1979-80 | New York Islanders | NHL | 77 | 14 | 30 | 44 | 49 | 8 | 21 | 7 | 9 | 16 | 18 |
| 1980-81 | New York Islanders | NHL | 70 | 20 | 32 | 52 | 57 | 8 | 16 | 5 | 8 | 13 | 16 |
| 1981-82 | New York Islanders | NHL | 80 | 35 | 58 | 93 | 57 | 48 | 19 | 6 | 10 | 16 | 18 |
| 1982-83 | New York Islanders | NHL | 76 | 31 | 40 | 71 | 55 | 30 | 20 | 7 | 11 | 18 | 20 |
| 1983-84 | New York Islanders | NHL | 73 | 27 | 40 | 67 | 66 | 21 | 17 | 1 | 3 | 4 | 31 |
| 1984-85 | New York Islanders | NHL | 80 | 42 | 58 | 100 | 95 | 50 | 10 | 1 | 8 | 9 | 10 |
| 1985-86 | New York Islanders | NHL | 65 | 20 | 41 | 61 | 50 | 22 | -- | -- | -- | -- | -- |
| 1985-86 | Calgary Flames | NHL | 9 | 3 | 4 | 7 | 10 | 0 | 22 | 7 | 9 | 16 | 49 |
| 1986-87 | Calgary Flames | NHL | 78 | 20 | 31 | 51 | 72 | -2 | 3 | 0 | 0 | 0 | 4 |
| 1987-88 | Calgary Flames | NHL | 74 | 17 | 41 | 58 | 84 | 10 | 6 | 2 | 5 | 7 | 8 |
| 1988-89 | Los Angeles Kings | NHL | 77 | 31 | 33 | 64 | 110 | 9 | 6 | 0 | 0 | 0 | 8 |
| 1989-90 | Los Angeles Kings | NHL | 73 | 31 | 37 | 68 | 62 | -8 | 10 | 1 | 2 | 3 | 6 |
| 1990-91 | Los Angeles Kings | NHL | 71 | 14 | 16 | 30 | 49 | 3 | 12 | 2 | 4 | 6 | 12 |
| 1991-92 | Chicago Blackhawks | NHL | 33 | 1 | 7 | 8 | 37 | 2 | -- | -- | -- | -- | -- |
| 1991-92 | Quebec Nordiques | NHL | 19 | 2 | 4 | 6 | 14 | -7 | -- | -- | -- | -- | -- |
| WHA Totals | 224 | 64 | 86 | 150 | 278 | 34 | 11 | 14 | 25 | 38 | |||
| NHL Totals | 1028 | 325 | 511 | 836 | 911 | 172 | 40 | 75 | 115 | 200 | |||