According to police, 37-year old Geoff Taylor -- Rob Dyrdek's lawyer on the show -- was arrested around 1:40AM this morning outside Calico Jack's bar in Glendale, Arizona.
Police tell us officers were breaking up a fight at the watering hole when Taylor "slapped the officers hand and pushed the officer in the chest."
Cops quickly took Taylor down, and arrested him for aggravated assault.
As for Taylor's gnarly scars -- cops say he sustained some of them during the fight ... and some during his arrest..
Taylor is still in custody.