Collingwood say Marley Williams deeply regrets the one-punch assault that could land him in jail, and the AFL club will continue to support and guide the troubled young prospect.
Williams' future was put in limbo at Albany District Court this week when a jury found him guilty of grievous bodily harm.
He will be sentenced in April for the attack on 29-year-old Matthew Robertson during the Christmas holidays in 2012.
Judge Julie Wager warned Williams the offence would usually attract an immediate prison term.
In a statement, the Magpies acknowledged the seriousness of the conviction and their commitment to the Western Australia-born Williams.
"Collingwood does not condone violence of any description," the club said.
"Marley looks back on the events of December 2012 with deep regret and will now pay a further price for his actions.
"The club does not wish to pre-empt in any way the sentencing process which is scheduled to take place in April, at which time the unusual circumstances of the offence and the personal circumstances of Marley will be taken into account.
"The club will continue to support and guide Marley's development as a young man and footballer.
Williams, who had to be granted permission by a judge even to train while on bail during the trial, was named in the Magpies' team to play in a NAB Challenge match in Wangaratta this weekend.
He will not take his place given the stresses of the week, but could line up in their third and final pre-season match.
Collingwood president Eddie McGuire said the young defender had "turned his life around" since the attack.
The trial heard that Williams told police he had been assaulted at the Albany nightclub and "I wasn't going to let them get the better of me".
But in court, he denied he had been angry and out for revenge when he hit Mr Robertson, claiming he feared for his safety as the men approached him on the street.
Prosecutors said Williams was acting out of "malicious, vindictive vengeance" when he swung the left-handed punch, which left Mr Robertson needing an emergency flight to Perth for surgery.
Prosecutors applied to have Williams jailed until the sentencing hearing, but that was refused by Judge Wager.
Instead, Williams was bailed, with conditions he report weekly to Richmond police station.