This unnamed mini golf club is a melee item due to appear in Grand Theft Auto VI, spotted in an official screenshot in the hands of the character Cal Hampton. It is depicted as a metal putter fitted with a blue plastic grip, evoking the series' tradition of turning everyday sporting goods into improvised weapons. No further details, such as damage or availability, have been confirmed.
Weapon data via GTA Wiki (Fandom), CC BY-SA 3.0.