Tyler Posey plays a wolf, but in real life he's becoming an even fiercer animal.
We got hold of this video, showing Tyler training for a boxing match which he is taking VERY seriously.
The Teen Wolf star will be going toe-to-toe with radio host Michael Tully at The Hard Rock Hotel in Vegas. The fight is 3 months away but Posey is already deep into training.
It's all for charity, but there's no law that says he has to be all Florence Nightingale about it.
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