Ranked third for most goals in the club's history with 786 after leading the Tigers' goal-kicking in 11 of his 17 seasons, Riewoldt on Tuesday told teammates he will wind up his AFL career that started in 2007.
The 34-year-old had been considering playing on next year after kicking 31 goals in an up-and-down season for Richmond.
Riewoldt was expecting to play a support role for Tom Lynch this year, but the towering Tigers forward has not featured since hurting his foot in round-four.
A three-time Coleman medallist, Riewoldt, with 346 appearances, will bow out having played the second-most games at Richmond behind Tigers legend Kevin Bartlett (403).
Riewoldt was a standout in his early years, even when the Tigers struggled, and continued to thrive when Richmond started playing finals consistently.
After the Tigers broke through for their first premiership in 37 years in 2017, Riewoldt famously got on stage with US indie rockers The Killers and belted out the band's iconic song Mr Brightside while still wearing his jumper from the grand final.
Richmond's final home game for the season is this Saturday against North Melbourne at the MCG.
Cotchin has missed the last two matches with calf soreness but will be given a farewell in front of the Tigers faithful against the Kangaroos.
Richmond, who will almost certainly miss finals unless a string of unlikely results fall their way, are set to end their season at the Adelaide Oval against Port Adelaide in round 24.
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