The short, sad life of hockey brawler Derek Boogaard is the

List of NHL enforcers who have passed away gets longer

With a lot of hard work, Derek Boogaard turned himself into a solid NHL player – Twin Cities

The Tragic Diagnosis They Already Knew: Their Brother Died With C.T.E. - The New York Times

Derek Boogaard: Blood on the Ice - The New York Times

NHL -- Derek Boogaard embraced the fighting that took a toll on his body and brain - ESPN

Cases of former Kings Jarret Stoll and Mike Richards put spotlight on NHL drug policy - Los Angeles Times

NHL enforcers' deaths raise questions about fighting, drugs, and depression

Reduce hits to head in hockey: expert – Winnipeg Free Press

BOY ON ICE: THE LIFE AND DEATH OF DEREK BOOGAARD, by John Branch

Punched Out: The Rise and Fall of Derek Boogaard

TIL about Enforcers, an unofficial role in ice hockey who's job is to deter dirty or violent plays by the opposition by responding with more violence. : r/todayilearned

NHL enforcers' deaths raise questions about fighting, drugs, and depression

Derek Boogaard: NHL Community Reactions to Rangers Enforcer's Passing, News, Scores, Highlights, Stats, and Rumors