Brown was sued by a paparazzo (not ours) back in May. Robert Rosen claimed he fell down a stairwell at an LA Fitness club after being chased by Brown's bodyguards and was then allegedly assaulted.
Brown has just filed legal docs -- obtained by TMZ -- claiming he's not responsible for the injuries because LA Fitness didn't properly maintain and supervise its operation -- we're assuming that means keeping photogs out of the joint.
The incident occurred a month after Brown assaulted Rihanna.
Brown claims ... if Rosen gets a judgment, the cost shouldn't be on his shoulders.