Wighton was celebrating his 30th birthday when police removed him from the nightclub and ordered him to leave the city area.
I thought I saw something different," Australian media quoted the police officer as saying to Wighton in court on Tuesday.
Australia Capital Territory (ACT) Magistrates Court judge Jane Campbell dismissed the case, triggering criticism of police and prosecutors.
The arrests were prominently reported by national broadcasters, with video showing four police officers pinning Aboriginal Australian Mitchell face-down to the ground.
"I hope everyone knows and understands the seriousness of what's gone on," South Sydney fullback Mitchell told reporters outside the court.
Persons:
South Sydney Rabbitohs Latrell Mitchell, Loren Elliott, Latrell Mitchell, Jack Wighton, Mitchell, affray, Wighton, Jack, Jane Campbell, what's, it's, they've, I've, Don Furner, Shane Rattenbury, Ian Ransom, Sonali Paul
Organizations:
South Sydney Rabbitohs, National Rugby League, Sydney Roosters, REUTERS, Rights MELBOURNE, Australian, Police, ., Capital Territory, Aboriginal, South Sydney, Canberra Raiders, ACT Attorney, ACT Policing, Thomson
Locations:
Sydney, Australia, Canberra, Melbourne