Boogaard died from an accidental mix of alcohol and the painkiller oxycodone ; Rypien had been suffering from depression ; Belak hanged himself .
Three former NHL enforcers -- Derek Boogaard , Rick Rypien and Wade Belak -- died in 2011 under circumstances consistent with post-concussion syndrome .
Derek Boogaard died from an accidental mix of alcohol and the painkiller oxycodone ; Rick Rypien had been suffering from depression ; Wade Belak hanged himself .
Three former NHL enforcers -- Derek Boogaard , Rick Rypien and Wade Belak -- died in 2011 under circumstances consistent with post-concussion syndrome .