MacKenzie, Brian, 1974- (Personal Name)

His Power, speed, endurance, 2012: t.p. (Brian MacKenzie) back cover (Strength-and-conditioning coach and creator of CrossFit Endurance)

TriMax Fitness website, Mar. 4, 2013: Trimax news center page (Brian MacKenzie ; Born on October 20, 1974; lives in Costa Mesa, Calif.)

Brian MacKenzie is a strength-and-conditioning coach and creator of CrossFit Endurance.