Martin Grenier (born November 2, 1980) is a Canadian former professional ice hockey defenceman who played in the National Hockey League (NHL) for the Phoenix Coyotes, Vancouver Canucks, and Philadelphia Flyers.

[citation needed] Left unsigned by Boston, Grenier signed with the Phoenix Coyotes prior to the 2001–02 season.

Since beginning his pro career, he spent most of his time in the AHL with a few callups to the NHL with the Coyotes, Vancouver Canucks, and Philadelphia Flyers.

[citation needed] In the 2008–09 season, Grenier signed with the newly formed KHL, joining Traktor Chelyabinsk and establishing himself as one of the league's premier fighters.

[citation needed] On June 18, 2011, Grenier was the second selection in the 2011 LNAH Draft.