For the current 2008-2009 nhl season the head coach is Mike Keenan
Well although I dont know of all time, the current youngest coach is Pat Fitzgerald of Northwestern.
Jeff Skinner : 18 Years old
Jeff Skinner was born May 16, 1992.
The current coach for the NHL team the Washington Capitals is Adam Oates. Oates became a member of the Hockey Hall of Fame in 2012, which is the same year he became captain for the Capitals.
Kevin Constantine wrong.Gary Green was 26 yrs old when hired by the Washington Capitals.
The New jersey Devils are a professional hockey team playing in the national Hockey League, or NHL. The team's current coach as of this writing is Peter DeBoer.
Laine Kiffin was the coach for the Oakland Raiders and the youngest NFL head coach in 2008. He was dismissed after 4 games.
It is either the Pittsburgh Penguins or the Washington Capitals. It's Chicago...Pittsburgh is 9th youngest and Washington is 16th youngest http://www.fromtherink.com/2008/10/24/641764/nhl-teams-by-age