Magloire was born in Toronto, Ontario, to Trinidadian immigrant parents, Garth, a welder, and Marion, an insurance worker.

On October 26, 2005, he was traded to the Milwaukee Bucks in exchange for Desmond Mason, a 2006 first-round draft pick and cash considerations.

[9] On July 31, 2006, during the off-season, Magloire was traded to the Portland Trail Blazers for Steve Blake, Ha Seung-Jin, and Brian Skinner.

[13] The Dallas Mavericks signed Magloire on February 26, 2008, to back up centre Erick Dampier after former Maverick center DeSagana Diop was traded to the New Jersey Nets in the blockbuster trade involving point guards Devin Harris and Jason Kidd.

[14] Magloire signed with the Miami Heat on August 30, 2008, for the veteran's minimum after nearing the luxury tax threshold.

[18] On December 9, 2011, Magloire signed a one-year deal with his hometown team the Toronto Raptors for the veteran's minimum.

The role involves Magloire assisting the Raptors' coaching staff with the individual skill development of their players in practices and games, while also making corporate/community appearances throughout the season on behalf of the team.

[22][23] In the early morning hours of June 23, 2001, Magloire's half-brother, 19-year-old Justin Sheppard, was shot and killed on the footbridge that spans the ravine around Rosedale Valley Road between Bloor Street East and Glen Road near Sherbourne subway station in Toronto.

Like Magloire, Sheppard was a promising basketball talent at Eastern Commerce, and was supposed to begin a scholarship at a Maryland prep school that fall.