LSU Tight End -- 'Doing Great' After Bar Stabbing ... Teammate Says

The LSU football player who was stabbed in a bar fight last week is on the mend and "doing great" -- one of his teammates tells TMZ Sports.

FYI, Dillon Gordon was hospitalized with injuries to his chest, stomach and legs after being stabbed multiple times at Reggie's bar in Tigerland. His alleged attacker Jamal Vaughn was arrested and charged with battery.

We spoke with Dillon's teammate -- and fellow LSU tight end DeSean Smith over the weekend -- who gave us an update on Dillon's health.

LSU coach Les Miles has since instituted a "No Bars" rule for players -- but Smith says there is a SAFER way for the football team to enjoy Louisiana nightlife ... never party alone.