Some fighters have Habitual dirty tactics in the Ring

Benn: Clubbing and hitting the back of the head

Sam Peter: Clubbing the back of the head

Hopkins Holding and hitting

Hatton: MMA fighting during a boxing contest

Winky Wright: Follows thru with Elbows after punching

Holyfield: Headbutting

Hopkins- Headbutt,holding and hitting

ALI-Holding and hitting

Taylor-Back handed Jab

PBF-Forearm on the back of the head and neck pushing down hard,pushing off of the break with forearm in the neck...and pushing his opponents

Golota- is jewel crusher

And any others you can think of