'Blue Mountain State' Star I'm Training ATTACK DOGS!!!

10/14/2011 4:50 AM PDT

The guy who plays the stud linebacker on "Blue Mountain State" got his ass kicked by 3 attack dogs yesterday ... and he couldn't have been happier about it.

Alan Ritchson ... along with 3 AWESOME doggies ... hit an L.A. park for some intense attack dog training -- and Alan played the role of human chew toy.

Alan says he got into attack dog training a few years ago ... insisting it's become an obsession -- and judging by the INSANE footage ... it's also one hell of a workout.