Williams completed some light ball work on Wednesday, but sat out the contact and fitness parts of the session.

The Raiders do not have a reliable date for the 24-year-old's return to the NRL, Mitch Cornish set to retain the halfback role for Sunday's game against the Canterbury Bulldogs at Canberra Stadium.

Raiders five-eighth Blake Austin said seeing Williams back on the training paddock was a huge boost.

"He's a tough little bugger and when you're a footballer you want to be out there training with the boys," Austin said. "He's itching to be around the boys again and to be back on the field."

Williams has made a huge impact since returning to the Raiders this season.

The Raiders have a 4-1 record when he is in the team, but have won just one of five games he hasn't played.

Cornish had a solid game in his return to first grade, throwing the final pass for two of the Raiders' three tries in their 32-18 loss to the St George Illawarra Dragons last Sunday.

"At the moment, we've got every confidence in Mitch," Austin said. "Mitch was pretty unlucky at the weekend, he came back in at a time when our forwards didn't roll the way they had been because the Dragons were really good with the ball."

The Raiders will wear a specially designed jersey against the Bulldogs that will feature the Tour de Cure logo and the Riding to Cure Cancer message. The jerseys will be auctioned after the game.

Raiders sponsor Huawei has committed a minimum $10,000 to the Bowel Cancer Australia auction.

For more information on Tour de Cure, visit tourdecure.com.au