January 1, 1910|
Humboldt, SK, CAN
|Died||August 7, 1934
Winnipeg, MB, CAN
|Height||5 ft 6 in (1.68 m)|
|Weight||155 lb (70 kg; 11 st 1 lb)|
|Played for||Chicago Black Hawks|
Playing career 
Jack Leswick played 3½ seasons for the Duluth Hornets of the AHA. He spent the second half of 1932–33 playing for the Wichita Blue Jays. He began the 1934 season in the AHA playing for the Kansas City Greyhounds. Leswick was called up to the Chicago Black Hawks shortly after the beginning of the 1934 season. He played 37 games, scoring 1 goal and 7 assists and was assessed 16 penalty minutes (PIM), as Chicago won the Stanley Cup championship that spring.
Suspicious death 
Leswick died in the off-season after the 1933-34 season. His body was found in the Assiniboine River without his wallet or other valuables. Leswick's death was ruled either a suicide or accident by the Winnipeg Coroner.
Awards and achievements 
- Two of his brothers Pete and Tony played in the NHL. Pete played briefly with the New York Rangers and Boston Bruins and Tony spent 12 seasons in the NHL with the New York Rangers, Chicago Black Hawks, and Detroit Red Wings. Tony won 3 Stanley Cups with Detroit in 1952, 1954, and 1955.
- Jack Leswick wore Uniform # 9 with the Chicago Black Hawks.
- Uncle of Lenny Dykstra