Where did he won this fights?
He captured Law without a fight, with capturing his crewmates...
And the fight against Luffy and Zoro, it was a fight against Zoro, which was only protecting the animal he was Standing on and a Little child, not offensive, only defense and still Hawkins lost several lifes. And even with his strong hunter-Card, he was not able to follow them, riding a simple animal, nothing pretty fast.