Collingwood tall Mason Cox is open to taking a pay cut in 2021 to remain a Magpie past next season.

The key forward triggered a clause in his contract that extended his stay at the Holden Centre and will earn him close to $550,000 for next year.

"An extension of his deal is definitely an option at the moment โ€ฆ that has been discussed (with Collingwood)," Cox's manager Adam Ramanauskas said on RSN.

"You can flatten out a (2021) deal. Absolutely, that is an option."

The Magpies are battling a tight salary strain with Adam Treloar, Jaidyn Stephenson and Tom Phillips all listed as gettable.

Ramanauskas also touched on his client Ben Brown, who requested a trade to Melbourne last week, revealing a deal isn't far off.

"It will happen โ€ฆ it might not be today, but it will definitely happen," he said.

"It would have been done on day one if it was my decision."