Fremantle's controversial decision to scrap the Ross Glendinning medal followed a failed bid to erase the West Australian football great's name from the award, it has been revealed.
The Dockers have confirmed they sought to rename the medal, which has been awarded to the player judged best afield in the AFL western derby since 2001, but were rebuffed by West Coast.
Glendinning was Fremantle's chairman of selectors when the medal was introduced but is best known as West Coast's inaugural captain.
"Whilst we acknowledge Ross Glendinning as a great West Australian player and Brownlow Medallist, he is the first captain of West Coast and a current and visible employee and brand ambassador of our derby opponents," Fremantle chief executive Steve Rosich said in a statement.
Both the medal and the trophy awarded to the winning team have been dumped following a change in sponsorship agreement with Carlton United Breweries.
Fremantle, who are the hosts of the round-six derby, announced the change on Monday night, describing it as a "joint decision" by both clubs.
But it emerged on Wednesday that the Dockers refused to continue with the award under its current name, while West Coast would not entertain a change.
"Given the new era at Optus Stadium, our board does not want to present a joint medal if it was to remain as the Ross Glendinning Medal," Rosich said.
"(In 2001), we were six years into our existence, and we did not have the history or status that our club has today.
"We would like the derby medal name to acknowledge both clubs' foundations and great players, rather than just one club."
West Coast chief Trevor Nisbett on Wednesday said the Eagles would not accept a change of name.
"There are a number of players who have won this medal who rate it right up there with some of their best performances," he told reporters.
"I think we need to preserve that as the Glendinning Medal and it should go on forever."
Dockers legend Paul Hasleby, who won a record four Ross Glendinning medals, on Tuesday said he was shocked and disappointed with his former club's decision.
"It's been a big part of my career," Hasleby told 6PR.
"It just stinks that this has been changed due to what is a commercial decision.
"You do not need a sponsorship agreement to give the Ross Glendinning Medal. I cannot understand the decision making made by the Fremantle Dockers."