Melbourne midfielder Brock McLean has arrived at Carlton headquarters, almost certainly confirming speculation he will become a Blues player during the upcoming AFL trade week.

The Demons announced on Wednesday night McLean had asked to be traded, with an in-principle agreement agreed with Carlton.

The 23-year-old, who has played 94 games for the Demons, said little as he arrived at Princes Park on Thursday.

But the tough onballer now looks certain to join a star-studded Blues midfield led by Chris Judd, with Melbourne gaining pick 11 in the national draft in return.

The deal, which would give the Demons four draft selections in the top 20, cannot be finalised until the official trade period next month.

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