Derek Keenan (born October 2, 1961, in Oshawa, Ontario) is a former lacrosse player, and current head coach and general manager of the Saskatchewan Rush of the National Lacrosse League. Keenan has won the NLL GM of the Year award and the Les Bartley Award for Coach of the Year three times each; he won both awards in 2006, 2010, and 2014 though he shared the 2010 Bartley Award with Chris Hall.