William Mailes "Cowboy" Cowley - Born June 12, 1912 in Bristol, Quebec – Died December 31, 1993 in Ottawa, Ontario was a Canadian ice Hockey centre and coach.

- Prince of Wales Trophy Champion 1938, 1939, 1940, 1941 with Boston Bruins.

- Stanley Cup Champion 1939, 1941 with Boston Bruins.

- Hart Trophy (Hart Memorial Trophy) Winner 1941, 1943.

- NHL All-Star Games 1938, 1941, 1943, 1944, 1945.

Cowley played all his minor, junior and senior Hockey in Ottawa, starting with the Glebe Collegiate in 1929, then the Ottawa Primroses in 1930, and leading the Primroses all the way to 1931 Memorial Cup final vs the Elmwood Millionaires. The teams each won a game in the best of 3 championship final, with Cowley scoring in both games which were played in Toronto. The third game was played in Ottawa, with Elmwood blanking the Primroses 3-0 before 9,000 fans, the largest crowd ever to watch a game in Ottawa to that point. Cowley scored 9 goals and 3 assists in the 9 playoff games.

Cowley then joined the Ottawa Jr. Shamrocks in 1931, and graduated to the senior Ottawa Shamrocks team in 1932-33, and proved he could handle the tougher competition. The Shamrocks lost in the Ottawa District Senior Championship final in 1933. Cowley was now was 21, and went on tour with the Ottawa Shamrocks in Europe in 1933. The Shamrocks, who went 33-0-2 in the tour before returning home.

Cowley would then travel to Canada's East Coast, and play for the Halifax Wolverines of the Maritime Senior Hockey League in 1933-34, dominating the scoring race with 25 goals and 50 points in 38 games.

Cowley was signed as a free agent by the NHL St. Louis Eagles on October 22, 1934 and made his NHL debut on November 8, 1934 vs Chicago Black Hawks at St. Louis Arena in a 3-1 Chicago win.

Cowley scored his 1st NHL goal vs Alec Connell of the Montreal Maroons at 9:10 of the 3rd period on January 5, 1935 at Montreal Forum in a 2-1 St. Louis win. His goal was the game winner.

The Eagles had just relocated from Ottawa. Cowley is the only Hall of Fame player to have begun his career with this club. When the team folded prior to the next season, Cowley was claimed by the Boston Bruins in a dispersal draft. The Bruins, a team stacked with experienced forwards, originally used him as a left winger, but his swift skating and precise passes forced them to move him to center.

Cowley broke through in 1937-38 with 39 points (17 goals) and selection to the NHL First All-Star Team, also helping Boston win the Prince of Wales Trophy as NHL regular season champions. The following season, Cowley recorded a league-high 34 assists, and another Prince of Wales Trophy. His passing and puck-handling wizardry helped the powerful Bruins win the 1939 Stanley Cup championship, their 2nd in franchise history. He formed a lethal combination with Mel "Sudden Death" Hill, who scored an NHL-record three overtime game-winners in the semifinals against the Rangers. Each tally was the result of Cowley's playmaking artistry. Two years later in 1940-41, Cowley won the NHL scoring championship, also helping Boston win the Prince of Wales Trophy for the 4th year in a row and then helped the Bruins win the 1941 Stanley Cup championship. His 1941 output (17 goals and 45 assists) recorded during a 48-game schedule, represented a new league standard for assists, and was awarded the 1941 Hart Trophy and selected to the NHL First All-Star Team.

Cowley's greatness was hampered by serious injuries. He missed much of he 1941-42 season with a broken jaw (broken in 5 places). He rebounded to capture his second Hart Trophy in 1942-43 (equaling his own season assist record). During this time, Cowley formed the revered Three Gun Line with Roy Conacher and Eddie Wiseman, and was again on the NHL First All-Star Team.

Cowley was having a fine 1943-44 season, but it was cut short by a separated shoulder. The injury cost him a shot at destroying the NHL single season scoring record. He was at 71 points with 6 weeks left. The old record was 73 points (held by Cooney Weiland). Cowley earned another NHL First All-Star Team selection - the fourth of his career, after scoring a career-high 30 goals, despite missing 12 games with the injury.

Cowley played with the Bruins until the end of the 1946-47 season, and on February 12 of that season he surpassed Syd Howe as the NHL's career point leader. This mark stood for five years until Elmer Lach overtook him. Along the way, Cowley recorded at least 30 assists on five occasions.

Cowley finished his NHL career with 195 goals (34 GWG - 1 OTG) and 354 assists for 549 points in 549 NHL regular season games (point per game), and scored 12 goals, 34 assists in 64 NHL playoff games.

The only NHL players who have scored more points per game in a season than Cowley's 1.97 in 1944 are Wayne Gretzky and Mario Lemieux.

Bill "Cowboy" Cowley was one of the top playmaking forwards in NHL history - three times in his 13-year career he led the NHL in assists. He always seemed to know where his linemates were positioned. An unselfish player who always aimed to set up a colleague for a goal before taking a shot himself, and he rarely jeopardized his team's fortunes by taking a penalty. Because of his ability to see the whole ice, he was arguably the Wayne Gretzky of his era.

After his career, Cowley went on to coach in the Ottawa senior leagues and the Vancouver Canucks of the PCHL.

In 1967, Cowley was a part-owner and founder of the Ottawa 67's junior ice Hockey team.

William ‘Bill’ Mailes Cowley was Inducted into Ottawa Sports Hall of Fame in 1967.

William Mailes (Bill) Cowley was elected to the Hockey Hall of Fame in 1968.