Calgary Stampeders defensive back Quincy Butler has been charged with assault.
Police say Butler got into a cab outside Cowboys nightclub around 3 a.m. MT Thursday when the driver asked for a deposit.
Officials say an argument ensued and the driver was assaulted several times.
A bystander who tried to help was also assaulted, according to police.
Security from the entertainment centre intervened and an arrest was made.
The taxi driver and bystander both suffered minor injuries.
Butler will appear in court on June 26. The Stampeders say the team is investigating the incident.