Bullocking Western Bulldogs fullback Marcus Adams will be held to his contract, according to foxsports.com.au.

Adams has formally requested a trade to Brisbane after three years at Whitten Oval, but the club aren't willing to let the defender depart with two years remaining on his contract.

“Marcus signalled that intention over the weekend that he would like a fresh start at Brisbane,” Dogs list manager Sam Power told the media at Marvel Stadium on the opening day of the trade period.

“From our end, he has two years on a contract, so he is a required player at the Western Bulldogs.

“We’ll hold him to the contract; he is a required player.

“No, I don’t know (why he wants out). He has just indicated that he wants a fresh start. We are keen to retain him; he is an important player at the Bulldogs.”

Adams was initially linked to a move back home to Western Australia, with Collingwood also expressing interest in the big-bodied defender, but it was the Lions' unexpected offer of a three-year deal which caught his eye.

Despite only managing 27 games in his three years with the Dogs due to a series of injuries, Adams is highly touted as a talented and strong key defender.