7. Campbell Brown / Steven May
In 2013, Suns teammates Campbell Brown and Steven May were involved in a drunken altercation outside an LA nightclub which saw May emerge with a broken jaw. The fight resulted in May requiring two plates and eight screws to keep his jaw in place and Brown being sacked from the Gold Coast Suns after a 205 AFL game career.
Whilst the Carey / Stevens situation was ugly and involved the AFL’s highest profile player it occurred in the off-season and the 2 never played for the same team again so it was hardly a long running feud within the confines of the club. i’m surprised you never included the likes of Andrew McLeod / Tyson Edwards and Gary / Steven Hocking. Both combinations played 200+ games in the same team and rarely spoke to each other and had major personal disagreements with each other.