Justin Hunter's off the hook for a MASSIVE bar brawl back in July ... 'cause a Virginia judge found the Tennessee Titans wide receiver not guilty ... TMZ Sports has learned.
Hunter was charged with misdemeanor assault and battery after allegedly breaking a man's jaw at a Virginia Beach bar over July 4th weekend ... hospitalizing the victim for two days.
The case went before a judge Tuesday ... and after only 4 hours, Hunter was found not guilty.
A spokesperson for the prosecutor's office told us they disagree with the finding, but respect the ruling.
"It is our belief we had sufficient evidence to prove the case beyond a reasonable doubt."
The case never affected Hunter's football career ... he played last week against the Tampa Bay Bucs ... and caught 1 ball for 11 yards.