Grappler
Requires Prerequisite
Prerequisite
Strength 13 or higher
Description
You've developed the skills necessary to hold your own in close-quarters grappling. You gain the following benefits:
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. The creature makes a Strength or Dexterity saving throw against your maneuver DC. On a failure, you and the creature are both restrained until the grapple ends.
Source
5e 2014 Rules
srd_grappler