I wouldn't normally keep a taunka as a captive, due to their close relationship with the Horde... but this one is a traitor, and a criminal to boot. Exiled by his own tribe, he canoed down to Azshara and was found stealing supplies from Valormok. He would have been put to the axe had I not been standing by, wallet in hand.
Gaur is my winningest gladiator, <class>. I'll bet you 10 silver that you can't beat him.