Bad as that looked, it was all part of what made The Commish such a lovable teddy-bear of a guy and got Chiklis onto the radar. And, at least according to Wikipedia, that wasn't natural, but a result of injudicious use of grease-paint for an earlier role.
And talk about range: it's hard to imaging two more diametrically opposed character portrayals than The Commish and Vick Mackey. Not to mention his stints as The Thing in the Fantastic Four movies.