Grappler

Effect: You’ve developed the skills necessary to hold your own in close quarters grappling. You gain the following benefits:

You have advantage on attack rolls against a creature you are grappling.
You can use your action to try to pin a creature grappled by you. To do so, make another grapple check. If you succeed, you and the creature are both restrained until the grapple ends.
Creatures that are one size larger than you don’t automatically succeed on checks to escape your grapple.