This season's free agency and trade period has officially closed and so it's time to look ahead to the biggest fish who could be on the market in 2020.

A number of stars will enter free agency who didn't make our list, including, Tom Hawkins, Ben Stratton, Robbie Gray, Bachar Houli, Josh P. Kennedy, Josh J. Kennedy, Shannon Hurn and Easton Wood.

However, due to age or just the sheer unlikelihood that they would leave their clubs, we've left them off our list in favour of guys who are either more getable or in their prime.

Here are the top 10 free agents of 2020:

8. Dyson Heppell (restricted)

Like Pendlebury and Viney before him, it's hard to see the Bombers skipper departing the club. Especially given everything he went through with them during the supplements saga.

But after a couple of down seasons by the lofty standards he set early in his career, could Heppell look for a fresh start elsewhere? Especially if the Bombers prove again how far away they are from a premiership, or even a finals win.

Heppell has career averages of 25.1 disposals, 5.2 marks and 3.8 tackles. If he was interested in assessing his options, there would be a number of suitors for the classy midfielder.

GOLD COAST, AUSTRALIA - AUGUST 22: Dyson Heppell of the Bombers celebrates kicking a goal during the round 21 AFL match between the Gold Coast Suns and the Essendon Bombers at Metricon Stadium on August 22, 2015 in Gold Coast, Australia. (Photo by Bradley Kanaris/Getty Images)