Ezekiel Elliott was at a Texas bar over the weekend when a violent fight broke out ... and now, cops tell TMZ Sports they're investigating if members of the NFL star's crew were involved.
According to Frisco Police Dept. documents we obtained, the disturbance happened at around 1 AM at Concrete Cowboy -- a nightclub located a few yards from the Dallas Cowboys' practice facility in Frisco.
Video shot by a patron at the establishment shows as Elliott was talking with a woman, several people got into a brawl just feet away.