Williams played 145 games in the Australian competition from 1987–88 and 1991–98, scoring a total of 63 tries and winning the 1995 ARL Premiership with the Canterbury club.

After the Grand Final loss to the Raiders, Williams spent a season in England playing for Salford, before returning to Canterbury for their 1995 premiership campaign.

Before the end of the 1995 season it was announced that Williams had signed with the Penrith Panthers for 1996 and he was promptly dropped to Reserve Grade by coach Chris Anderson after Round 17.

Williams was selected as part of the New Zealand team for the 1995 Rugby League World Cup and played in just one game during the tournament.

The game against Papua New Guinea at Knowsley Road in St. Helens, England, saw the Kiwis win 22-6 on their way to a Semi-final berth against the eventual champions, Australia.