Grappler (Buffed)

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

• Increase your Strength score by 1,to a maximum of 20.
• You have advantage on attack rolls against a creature you are grappling.
• You have expertise on Strength (Athletics) proficiency check when attempting to grapple or restrain a creature, if you already have expertise on strength (Athletics) check then this won't have any extra effect
• You can use your action to try to pin a creature grappled by you. To do so, make another grapple check. If you succeed, The creature is Restrained and you are Grappled
• You can attempt to  Restrain up to 2 creatures using your action if you have them grappled, in doing so you are also Restrained if successful on both creatures
• You can attempt to grapple on a opportunity attack, must have 1 free hand and you must Succeed a unarmed strike Hit dice, then attempt a grapple check,This reaction does not deal damage