Former Collingwood-listed player Shae McNamara has called for key club figures to speak up and acknowledge Heritier Lumumba's experience with racism.
"I have bitten my tongue for far too long and I can no longer stay silent in what has really bothered me," McNamara said on social media (Twitter).
"The interpersonal racism happened (i.e. racist jokes, nicknames, stereotypes etc.) (Lumumba's) not bitter because he was traded - he was traded because he wouldn't stop addressing the toxicity in the club.
"You need to honour the effects of trauma - he felt racism his entire life, in the club, against opponents and through media/social media - everyone has their breaking points. This isn't about destroying the club - this is about making sure this is the last time anyone at CFC experiences what he did."