| Position: | Defence |
| Played For: | Calgary Tigers Vancouver Maroons New York Rangers |
| Shoots: | Left |
| Height Ft: | 5 |
| Height In: | 7 |
| Weight Lb: | 155 |
| Birth Date: | 1899 5, mf=yes |
| Birth Place: | North Gower, Ontario, Canada |
| Death Place: | Calgary, Alberta, Canada |
| Career Start: | 1919 |
| Career End: | 1934 |
William Reginald Wallace Mackey (May 7, 1899 – February 26, 1966) was a Canadian professional ice hockey defenceman who played one season in the National Hockey League for the New York Rangers, in 1926–27. He also played for the Calgary Tigers and Vancouver Maroons in the Western Canada Hockey League from 1922 to 1934. Mackey was born in North Gower, Ontario and moved to Calgary in 1907. He later married Barbara, and had two daughters. From 1930 to 1964 he worked with the British American Oil Company.[1]
| Regular season | Playoffs | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Season | Team | League | GP | PIM | GP | G | A | Pts | PIM | |||||
| 1919–20 | Calgary Wanderers | Big-4 | 6 | 1 | 0 | 1 | 0 | — | — | — | — | — | ||
| 1920–21 | Calgary City Seniors | CCSHL | — | — | — | — | — | — | — | — | — | — | ||
| 1921–22 | Calgary City Seniors | CCSHL | — | — | — | — | — | — | — | — | — | — | ||
| 1922–23 | Calgary City Seniors | CCSHL | — | — | — | — | — | — | — | — | — | — | ||
| 1922–23 | Calgary Tigers | WCHL | 1 | 0 | 0 | 0 | 0 | — | — | — | — | — | ||
| 1923–24 | Bellevue Bulldogs | ASHL | — | — | — | — | — | — | — | — | — | — | ||
| 1923–24 | Bellevue Bulldogs | Al-Cup | — | — | — | — | — | 4 | 1 | 0 | 1 | 0 | ||
| 1924–25 | Calgary Tigers | WCHL | 16 | 3 | 0 | 3 | 15 | 2 | 0 | 0 | 0 | 2 | ||
| 1925–26 | Vancouver Maroons | WHL | 29 | 8 | 0 | 8 | 23 | — | — | — | — | — | ||
| 1926–27 | New York Rangers | NHL | 41 | 0 | 0 | 0 | 16 | 1 | 0 | 0 | 0 | 0 | ||
| 1927–28 | Boston Tigers | Can-Am | 37 | 18 | 2 | 20 | 78 | 2 | 0 | 0 | 0 | 2 | ||
| 1928–29 | Boston Tigers | Can-Am | 33 | 15 | 4 | 19 | 66 | 4 | 1 | 1 | 2 | 8 | ||
| 1929–30 | Boston Tigers | Can-Am | 37 | 19 | 7 | 26 | 104 | 4 | 3 | 1 | 4 | 16 | ||
| 1930–31 | Boston Tigers | Can-Am | 40 | 6 | 9 | 15 | 80 | 8 | 1 | 1 | 2 | 6 | ||
| 1932–33 | Calgary Tigers | WCHL | 30 | 9 | 2 | 11 | 42 | 6 | 0 | 1 | 1 | 5 | ||
| 1933–34 | Calgary Tigers]] | NWHL | 3 | 0 | 0 | 0 | 0 | — | — | — | — | — | ||
| Can-Am totals | 147 | 58 | 22 | 80 | 328 | 18 | 5 | 3 | 8 | 32 | ||||
| NHL totals | 41 | 0 | 0 | 0 | 16 | — | — | — | — | — | ||||