Grappling Master

Accustomed to rough-and-tumble fighting using nothing but your bare hands, you gain the following benefits:

• Increase your Strength or Constitution score by 1, to a maximum of 20.
• When you start your turn with a creature that is grappled deal your STR Modifier to the grappled creature. 
• Your unarmed strike uses a d6 for damage. 
• As an attack action You can attempt another grappling check Str (Athletics) vs opposing Str (Athletics) or Dex (Acrobatics) checks. If you succeed, you pin the opponent to the ground. This upgrades the Grapple Condition to Restrained.