Jack is such a clown. He's got a "biting" martial art, but it's completely pointless when fighting with self-imposed rules that avoid doing permanent damage to his opponent. He could have gone for the throat and that's lethal, but instead he gave a few silly bites (using fangs like a knife is just dumb; a knife is claws, an extension of the limb), called it a day and proceeded to punch, kick and german supplex his opponent for a knock-out and then mimed biting Pickle.
Well, poor Pickle couldn't do anything, and is basically just a somewhat intelligent beast, so I can understand why Jack would be super gentle with him and not do something like lock and break his joints to send him to the hospital (not that that was ever his style).
They should probably take this opportunity to put Pickle in a zoo or something. It doesn't seem like he'll train to improve and make sure he doesn't lose in the future, so if we see him, he'll just be jobbing.