UFC Vegas 123 fight previews and weigh-in developments

On event day, Oct. 31, Francis Marshall weighed in at 148 pounds, two pounds over the featherweight limit, and forfeits 20% of his purse for a catchweight bout with Dakota Hope; the other 23 fighters made weight. Preview coverage centers on Moicano-Nolan and Brown-Smith, but is repetitive. Prioritize official results and substantive technical analysis.