Quenneville has been a proven winner throughout his coaching career, posting an 851-487-77-124 record over parts of 20 years as a head coach in the NHL, including eight years with the St. Louis Blues (1996-2004) and three with the Colorado Avalanche (2005-08). His 851 wins lead active head coaches and rank second in NHL history, while his 1,539 games behind the bench also lead active head coaches and rank third all-time. The Windsor, Ontario, native has guided 18 of his 20 teams to the postseason, which includes reaching the conference finals on six occasions, as well as postseason berths in nine consecutive seasons from 2009 to 2017 with Chicago. He owns the franchise record with 76 playoff wins and paces active NHL head coaches with 118 overall postseason victories.
One of only two men in the history of the NHL to have played in 800 or more games and coached 1,000 or more games (J. Lemaire), Quenneville has notched at least 40 wins in 16 of his 17 full seasons as a head coach, which includes a career-best 52 victories with Chicago in 2009-10. He is the winningest coach in Blues history, having compiled a 307-191-95 record at that post, and was awarded the 2000 Jack Adams Trophy while at the club. Quenneville also coached teams at two NHL All-Star Games and served on Team Canada's coaching staff at the 2016 World Cup of Hockey. In addition, he has served as President of the National Hockey League Coaches' Association since June 2015.
Quenneville was selected by the Toronto Maple Leafs in the second round (21st overall) of the 1978 NHL Draft. He spent 13 seasons as an NHL defenseman, netting 54 goals, 136 assists and 705 penalty minutes in 803 career games with the Toronto Maple Leafs (1979- 80), Colorado Rockies (1980-82), New Jersey Devils (1982-83), Hartford Whalers (1983-90) and Washington Capitals (1990-91).
He retired as an active player after the 1991-92 season, when he served as a player-coach for the American Hockey League's St. John's Maple Leafs. Quenneville broke into coaching with the AHL's Springfield Indians before serving as an Assistant Coach for the Quebec Nordiques/Colorado Avalanche organization for two and a half seasons and helping Colorado capture the 1996 Stanley Cup.
Quenneville and his wife, Elizabeth, have three children: Dylan, Lily and Anna.