Mitch Duncan took winning a premiership in his first season at Geelong for granted.

The Carine product was just 20 when the Cats beat Collingwood in the decider to secure their third flag in five years.

Since then, Geelong has featured in September in all but one year - including five prelims - without another premiership.

“It was something that I probably took for granted at the time,” Duncan said.

“I think it would be a lot more different now if we had won one over the last couple of years or if we win one in the future - just how hard they are to actually come by.

“You probably just think you’re going to get back there quite easily, but it’s just not that easy.”

Duncan was substitute that day, brought on after forward James Podsiadly dislocated his shoulder. He went on to play an important role with 10 disposals and a brilliant long-range running goal as the Cats stormed home to grab a 38-point win.

“I never liked the rule, first and foremost - the sub rule - but I feel lucky to be a part of it,” Duncan said.

“Obviously played with some unbelievable players in that little era. Champions of the footy club and the AFL and they carried me along the way.”

Geelong return to Optus Stadium for the first time since being belted by Melbourne in the preliminary final last season.

After spending 10 weeks on the sidelines with a PCL injury, Duncan played in all three finals but the Cats ultimately fell short of another grand final berth.

“Every year I suppose the fire is being fuelled to go again and that’s why we keep rocking up every year,” Duncan said.

“Being at the Cats we’ve always got a list to contend for a chance to play finals and that’s something that I can’t thank the club enough for because some other clubs aren’t in that position and obviously it can get a little bit tough at times.

“But in the years that I’ve played footy, to be able to play finals most years is quite lucky.”

Duncan also praised the role of decorated coach Chris Scott, who signed a two-year extension earlier this year.

“He’s obviously been awesome. I really enjoy how he thinks about and the way he sees the game. It’s unbelievable, to be honest. That’s probably why he’s been in the role for so long,” Duncan said.

“His ability to understand the new trends, coach to the list, to the players he’s got around him, to their strengths.

“He’s become really personable, and I think he does a great job and glad that he’s around for another two years. And that’s when I’m out of contract, too, in 2024. So we’ll see where it takes us.”

Geelong sit just outside the top four (8-4) ahead of their clash with bottom-placed West Coast.