Any longtime MMA fan who watched both of their careers from start to finish know that BJ Penn is the lightweight GOAT. Khabib didn’t stick around long enough to prove he was the lightweight GOAT. Not to take anything away from Khabib, but BJ Penn was dominant for so long, (and if the division didn’t take a hiatus, most likely longer). Plus he won the belt at Welterweight and even drew with Machida at LHW, when Machida was in his prime. People forget because BJ fought for too long and the newer fans only remember is crazy losing streak. If he had of retired like GSP, it would have been a different story. BJ is the LW GOAT.