Bob Hamley is the former head coach of the Colorado Mammoth of the National Lacrosse League. He is also a former head coach and General Manager of the Edmonton Rush, and a former NLL player.
Hamley played four seasons with the Buffalo Bandits, winning two Championships. Following his playing career, he became head coach and GM of the Kitchener-Waterloo Braves of the Ontario Lacrosse Association. After three years in Kitchener-Waterloo, Hamley was named an assistant coach to Bob McMahon of the Albany Attack, and took the team that had the league's worst offense in 2001 to the 2002 Championship game, losing at home to the Toronto Rock.
In September 2002, Hamley was named head coach and GM of the Columbus Landsharks. In 2003, the Landsharks moved to Arizona, becoming the Sting. Hamley hired Bob McMahon, his boss in Albany, to be an assistant coach.
In the 2005 season, the Sting finished second in the Western Division, and beat both Colorado and Calgary to make it to the Championship game. However, history would repeat itself as Hamley and McMahon were denied the Championship once again by the Toronto Rock. Hamley was named the 2005 recipient of the Les Bartley Award for Coach of the Year, and the next day was also named GM of the Year, becoming the first person in league history to win both awards. In the 2007 NLL season, he again brought his team to the championship game, this time losing to the Rochester Knighthawks. Hamley continued to serve as the Stings head coach and General Manager until the 2008 NLL season, when the Sting decided for "a number of business reasons" to opt out of the 2008 season following the labor dispute.