UFC on ESPN 56 pre-event facts: Can Derrick Lewis extend all-time KO record?

The octagon returns to St. Louis for the first time since January 2018 on Saturday with UFC on ESPN 56, which goes down at Enterprise Center and features a 13-bout lineup headlined by heavyweights.All-time UFC knockout record holder Derrick Lewis (27-12 MMA, 18-10 UFC) gets another main event assignment. “The Black Beast” takes on the unheralded Rodrigo Nascimento (11-1 MMA, 4-1 UFC) in a five-round fight that will push the winner into an upward trajectory.For more on the numbers beh