Walters and Fremantle's first-to-fourth year players returned for their first day of pre-season at Fremantle Oval, taking part in some agility work, light skills and running.
Walters, who is not due back at the club until December 1, joined in the running session. Fremantle's senior development coach Simon Lloyd said he was not surprised to see Walters back at training so early.
"He's a real professional," Lloyd said.
"He's become a great leader at the club as well. He's one all of us hold in really high regard and he's one of the premier small forwards in the competition."
Walters played just eight matches last year, missing 16 weeks with a serious ankle injury.
The dynamic small forward signed a two-year contract extension last week to remain at the club until 2018.
Walters wasn't the only senior Docker to train on Monday. West Coast's entire squad turned up to the first full training session of their pre-season at UWA Sports park only to find Dockers trio Tendai Mzungu, Matt de Boer and Alex Silvagni running repeat 400s at the grass running track.
There were some notable first-to-fourth year Dockers who were absent at Fremantle Oval on Monday morning. Midfielder Lachie Neale has had a minor procedure on his knee during the off-season and is being managed early in the pre-season.
"He's fine," Lloyd said.
"He's in great shape for somebody that hasn't done the bulk of the work but he'll be fine."
Cam Sutcliffe is only being managed as he has had issues with his feet in the past.
"He did surprise a lot from outside the club (with that result) but from within the club he didn't surprise many," Lloyd said.
"Cam is a fairly durable player. He'll be back within the program before too long.
Max Duffy was in the gym doing rehab on his shoulder after having post-season surgery.
Lloyd said the club had no specific targets in next week’s NAB AFL Draft although coach Ross Lyon had previously stated that the club was still in the market for key position players.
"I think we've always spoken about taking the best players available and we'll have our order of picks and that's the way we'll go," Lloyd said.