David Williams is an Australian professional rugby league footballer for the Manly-Warringah Sea Eagles in the National Rugby League (NRL) competition. He plays on the wing and can also play in the centres. He is also the younger brother of North Queensland Cowboys player, John Williams.

In 2008, Williams developed a cult following and became known as the “Wolfman” for his shaggy locks and full beard. Williams scored a try in the 2008 NRL Grand Final victory over Melbourne Storm. Following the Manly Sea Eagles Grand Final victory, he had his beard removed by Manly team-mates as he slept.