Ex-NFL wide receiver Titus Young ducked out of a court-ordered treatment center and beat a guy so badly, the dude was hospitalized with brutal injuries ... this according to a lawsuit obtained by TMZ Sports.
We broke the story, the former Detroit Lions star was arrested for allegedly attacking a guy in L.A. on January 30th. Now, the alleged victim has fired back with a suit, blaming Young's parents for not turning their son into cops before the incident.
FYI, Young was ordered to spend 12 months in a treatment facility after pleading no contest to felony battery back in May for a separate incident.