Dunn, the No.15 pick in the 2004 national draft, played 165 games for Melbourne.

He added a further 33 for Collingwood over the past four years.

The 33-year-old Dunn spent 773 days on the sidelines after back-to-back reconstructions on his left knee, and he was swarmed by teammates when he kicked a goal upon his AFL return in round 11 this year.

Dunn went on to play just one more game for the season and joins Ben Reid and Travis Varcoe in retirement.

The retirement of 198-gamer Dunn means the only remaining active player from the 2004 national draft crop is Sydney superstar Lance Franklin.

Scharenberg, the No.6 pick from the 2013 national draft, spent seven seasons at Collingwood for a total of 41 matches, including three this year.

The 25-year-old endured three knee reconstructions during his stop-start career at the Magpies, and he hopes to earn an AFL lifeline at another club.

Broomhead also aims to continue his AFL career.

The No.20 pick from the 2012 national draft suffered a serious broken leg in round two, 2018.

The 26-year-old Broomhead made a comeback in round 11 this year but couldn't hold his spot in the side.

He finishes his time at Collingwood with 37 matches to his name.

Australian Associated Press