Essendon have shown preliminary interest in West Coast youngster Brant Colledge.

Colledge, who turns 21 next week, requested a trade last week, despite having a year left to run on his contract, in order to obtain greater opportunity.

Brant Colledge (right) has attracted the attention of Essendon. Credit:Getty Images

It's understood Colledge could be open to staying at West Coast after veteran midfielder Matt Rosa sought a move from the club on Wednesday. Rosa is also contracted for 2016.

The Eagles last week told Colledge they would try to help him find a new home, provided a suitable trade could be found. The 192cm midfielder played one game in 2015, following three last season, after having been taken in the 2012 draft.

West Coast have been busy in the trade period. They have lost Scott Selwood as a free agent to Geelong, and traded contracted ruckman Callum Sinclair to Sydney in exchange for midfielder Lewis Jetta. Sinclair's departure is likely to grant delisted Port Adelaide big man Mason Shaw an opening on the Eagles' rookie list.

Bombers veteran Brent Stanton remains out of contract, and is an unrestricted free agent. The Eagles are believed to have inquired about him, although new Essendon coach John Worsfold told 5AA radio on Wednesday that he expected Stanton to stay at the Bombers.