UFC St. Louis co-main event scrapped after Hall fails to weigh in

Vitor Belfort's swan song will have to wait.

UFC Fight Night 124's middleweight co-main event between Belfort and Uriah Hall has been scrapped after the latter failed to tip the scales at Saturday's weigh-ins in St. Louis, the promotion confirmed.

Hall was on weight and headed to the scale when he fainted, suffering what's believed to be a seizure, according to MMA Fighting's Ariel Helwani. He's since been transported to hospital and stabilized for further evaluation.

A women's flyweight tilt between Paige VanZant and Jessica-Rose Clark will replace the ill-fated matchup as the bill's co-headliner, with featherweights Michael Johnson and Darren Elkins getting the bump from the prelims to the main card. It remains to be seen whether Belfort - who successfully weighed in at 186 pounds - will wait for one final dance partner or call it a career as he'd planned to do Sunday.

Also nixed was a welterweight tilt between Thiago Alves and Zak Cummings. The pair were scheduled to kick off the evening's prelims until Cummings slipped while exiting the bathtub and cracked his skull on a handrail Friday.

In the event's featherweight headliner, Jeremy Stephens will meet Doo Ho Choi.