TALL forwards and ruckmen are likely to be at a premium in the upcoming AFL national and pre-season drafts, after several clubs failed in their attempts to trade for them during the week.

Western Bulldogs football manager James Fantasia said his club had entered the trade period with an aim to pick up a tall forward, but would now have to go down a different path.

"We tried to get Barry Hall (from Sydney) and Ashley Hansen (from West Coast) and a couple of other blokes too, but it didn't go our way," he said.

However, he said that after trading away midfielder Farren Ray to St Kilda in return for national draft pick 31, it would enhance the club's opportunity to recruit a young key forward.

"We've got to take the responsibility to develop those type of players from the draft and with the pick we got for Farren gives us a genuine chance of doing that," he said.

The Dogs have already secured young ruckman Ayce Cordy with their first draft pick, under the father-son rule.

Saints coach Ross Lyon said his club had also been on the hunt for a tall forward, to slot in alongside Nick Riewoldt and Justin Koschitzke, but said "they're not easy to come by".

But the Saints were happy to have added depth and pace to their midfield with the acquisition of Ray.

"He's a (former national draft) pick four and really adds to our run and spread through the midfield," Lyon said.

While those two clubs are looking to add a tall forward, Richmond and Melbourne are seeking to boost their ruck stocks.

The Tigers failed to come to terms with West Coast over big man Mark Seaby, who was looking to leave the Eagles for greater opportunity.

The Demons had been in the hunt for Fremantle's young ruckman Robert Warnock, but the 21-year-old preferred Carlton and was able to get to the Blues through a trade. AAP