Adam Deadmarsh (born May 10, 1975 in Trail, British Columbia, Canada) is a former National Hockey League hockey player who played for the 1996 Colorado Avalanche Stanley Cup winning team. He was drafted by the Quebec Nordiques in the 1993 NHL Entry Draft, first round, fourteenth overall. He was traded to the Los Angeles Kings on February 21, 2001 along with Aaron Miller, a player to be named later (Jared Aulin), Colorado's first round pick in the 2001 NHL Entry Draft, for Rob Blake and Steve Reinprecht. Among his final accomplishments in the NHL, he is known as a playoff hero for vaulting the Kings past the heavily favored Detroit Red Wings in round one of the 2001 Stanley Cup Playoffs, after trailing late in Game 4 by two goals while his team was already down two games to one. The Kings would go on to lose in the conference semifinals to his former Avalanche, the eventual 2001 Stanley Cup champions, in seven games.
A naturalized U.S. citizen by virtue of having an American mother, he played for Team USA in the 1998 Winter Olympics and the 2002 Winter Olympics, winning a silver medal in Salt Lake City. After missing the most of the 2002-03 NHL season and the entire 2003-04 NHL season due to two concussions (and the next season due to the NHL lockout), he (unofficially) announced his retirement on September 22, 2005 citing the previous concussion as an inability to play further. He was honored on March 20, 2006 before a game between the Avalanche and Kings at Staples Center in downtown Los Angeles, California for his dedication to both teams.
He had previously played junior hockey for the Portland Winter Hawks in the Western Hockey League, and now resides in Idaho with his wife and twin daughters.