Former Sheffield United star Curtis Woodhouse stepped in when another ex-Blade started throwing punches in the crowd.
Sheffield-born Goole Town captain Karl Colley was filmed storming into the crowd during his side’s 3-0 defeat against local side Coalville Town on Saturday afternoon.
The video, shot by a spectator on a mobile phone, has already had almost 300,000 views on YouTube.
Colley – who was on Sheffield United’s books as a youngster as well as playing for Sheffield FC and Stocksbridge Park Steels – was sent off following a bad tackle and was enraged after being goaded by abuse from the terracing.
It is thought the attack –which came on the 19th anniversary of Manchester United star Eric Cantona’s notorious ‘kung-fu’ kick at Crystal Palace – was directed at a home fan, rather than an away one.
Goole sacked Colley, recently of Woodhouse, Sheffield, immediately after the final whistle.
The club said: “After the deplorable incident at Saturday’s home game, we can confirm the player responsible has been released by the club.
“We are a family club and incidents of this nature have no place in football. The player in question will never play for our club again.
“We apologise to each and every supporter at the game and, while we can’t legislate for incidents of this nature, we will not tolerate them from anyone.”
Former Sheffield FC manager and professional boxer Woodhouse, now Goole’s assistant manager, tried to stop the player.
Afterwards, he Tweeted: “Thought I’d seen it all, I now have.”
And Colley, aged 30, who arrived at Bramall Lane during the Neil Warnock era, tweeted: “Thanks for people’s comments saying do I fancy a round with them.
“Clearly these people don’t know me or anything about me but that’s fine.”
Humberside Police said it was aware of the incident, but declined to comment.
The FA said it was waiting for the match referee’s report before deciding what action to take.