Path of the Fisticuffs

with your life on the streets and a lack of interest in weapons you come to find your fists are your greatest friends 

Broken fist fighting

with fighting on the street for so long you've lost feeling in your hands allowing you to swing hard without having to worry about the pain of hitting steal.

while raging your unarmed strike does 1D6 + your STR modifier of bludgeoning damage

this increases to 2D6 at 6 level, 3D6 at 10th level, and 4D6 at 14th level

Thick skin

while raging you gain Immunity to to nonmagical bludgeoning damage

Cracking Uppercut

while raging as a bonus action you can hit a creature with the cracking uppercut to knock them prone. they must make a strength saving throw (DC=8+PB+STR Modifier). the damage of the uppercut scales with the damage from the Broken Fist Fighting style. you can use this feature a number of times equal to your proficiency bonus and gain all expended uses after a short or long rest

Knock out Punch

You swing a deadly Right hook and aim to put your target to sleep 

while raging You can use an action to attempt to put the target to sleep taking the Broken Fist Fighting damage. they must make a constitution saving throw or be knocked unconscious for 1 minute. this unconscious state ends early if they are woken up or take damage.