A combination of things led to the lowest prelims audience in years prior to a UFC pay-per-view show.
Last Saturday's two-hour prelims was split with the first hour on FS 2, unadvertised on the station, and the second hour on FS 1, starting one hour after its scheduled start. The first hour did 153,000 viewers from the more limited FS 2 universe. The second hour, headlined by the Sara McMann vs. Ketlen Vieirra fight, on FS 1, did 418,000 viewers, or less than half of what had been the average for FS 1 prelims in 2017 going into Saturday of 865,000.