The Brisbane Lions experienced tremendous success to start this century off going back-to-back-to-back (2001-03) before a slow decline that saw them lose the 04' Grand Final and only make the finals once since (2009).

In order to make its way up the ladder, Brisbane were forced to make personnel changes including many players who have gone on to lead successful careers at rival clubs.

Either seeking opportunity elsewhere or falling out of favour with the coach/board, players opted to change the Lion that was originally on their jersey, to something else.

Some trades worked out for Brisbane, but as most people are aware, a lot didn't.

Here are the top 10 players Brisbane have let go since 2003.

4. Jack Crisp

Crisp was recruited in the rookie draft in 2011 by the Lions and struggled to break into the side. He was only able to play 18 games for Brisbane before being part of a trade that saw him go to the Pies for Dayne Beams and a high draft pick.

In what seemed to be a sweet deal for the Lions, time would say that that isn't the case.

Since coming across in 2015, Crisp is yet to miss a game, having played 100 games consecutively.

He was a massive part of the Pies' drive toward that last day in September with his pace and line-breaking speed off half-back.

Crisp has been tremendously consistent for the Black & White and regret would be playing on the Lions' mind.

As it turns out, that high draft pick turned out to be Jordan De Goey and to worsen the wound, Beams returned to the Pies at the end of 2018.

GOLD COAST, AUSTRALIA - JULY 21: Jack Crisp of the Lions competes for the ball during the round 17 AFL match between the Gold Coast Suns and the Brisbane Lions at Metricon Stadium on July 21, 2012 on the Gold Coast, Australia. (Photo by Matt Roberts/Getty Images)