Jason “Mayhem” Miller, troubled MMA fighter, has been charged with 2 felonies — assault and battery — for his alleged involvement in a bar fight where he’s accused of breaking another man’s ribs.

We broke the story … 40-year-old Miller was allegedly involved in a brawl outside a San Fernando Valley bar in early September. The man Mayhem is accused of hitting initially decided not to file a police report … however, changed his mind after going to the hospital, where he was diagnosed with cracked ribs.

Earlier this week, officials decided to charge Miller with felony assault and felony battery … charges that could carry years behind bars, if convicted.

The two felonies aren’t the only charges Miller is contending with … he was recently arrested for felony domestic violence after allegedly roughing up his girlfriend.

Miller — who hasn’t fought in the UFC since 2012 — last fought professionally in 2016 … losing his last fight via a rear-naked choke.

His life post-fighting has been marred with arrest after arrest … and now the one-time star is facing more serious charges.