Boxer Victor Ortiz -- Charged with Assault & Battery ... For Country Music Brawl

Boxing stud Victor Ortiz -- a former "Dancing with the Stars" competitor -- has been charged with misdemeanor assault and battery for allegedly beating a guy up at a Jason Aldean/Kenny Chesney concert.

TMZ Sports broke the story ... the 28-year-old -- who has appeared in several movies including "Expendables" and "Southpaw" -- was originally arrested for assault with a deadly weapon on July 25th after a fight broke out at the Rose Bowl.

Ortiz and his brother allegedly got into it with another man -- and officials say Ortiz kicked the man while was down.

The L.A. County District Attorney declined to press felony charges -- and kicked it down to the Pasadena City Prosecutor who decided to move forward with misdemeanor charges.

Ortiz was hit with assault and battery. If convicted, he faces up to 1 year in jail for each charge.

Victor's brother was charged with one count of battery causing serious bodily injury.

Ortiz is set to be arraigned next week.