The wrestler

On your turn, if you grapple a creature using your attack action, you can use your bonus action to perform following wrestling moves on the creature. If you pick a move before performing it, you must pass the corresponding strength check mentioned next to the move.

If failed to pass the strength check for the mentioned move then no damage and creature escapes from grapple.

If the strength check is passed then the move is successfully performed then creature takes corresponding damage and is out of grapple and prone.

At 5th level damage die increases to D8, 10th level to D10, 15th level to D12. Strength check requirements increase by +1 along with the damage die increase.

Back slam - 1D6 bludgeoning damage

Front slam - 2D6 bludgeoning damage ( DC 12 )

Throw slam - 3D6 bludgeoning damage ( DC 14 ) - Choose to throw the creature10 feet away to the left or right. 

Choke Slam - 4D6 bludgeoning damage ( DC 16 ) 

Spine buster - 5D6 bludgeoning damage ( DC 20 )

If you rolled a natural 20 for any of the strength checks above then you perform the first 3 moves back to back on the creature without any extra strength checks on the same turn.

A natural 1 rolled by you for any of the strength checks above will be an automatic escape for the creature anytime.