Thug (5e Class Feature)
From D&D Wiki
This feature is built for Thugs who enjoy indulging in being of a roguish sort after all not every Rogue relies on a weapon to get their job done, it replaces the Rogue's weapon proficiencies. At 1st level the Rogue uses 1d4 for unarmed attacks which increases to 1d6 at 5th and 2d4 at 11th. On top of that the Rogue's unarmed attacks are considered finesse.