Dennis Sean Haley (born February 18, 1982) is an American former professional football linebacker.

He most recently played for the BC Lions of the Canadian Football League (CFL).

He was originally signed by the New York Jets of the National Football League (NFL) as an undrafted free agent in 2005.

On March 15, 2010, Haley was acquired by the BC Lions from the Hamilton Tiger-Cats in exchange for DB Jerome Dennis.

This biographical article relating to an American football linebacker born in the 1980s is a stub.