The UFC 291 main card on pay-per-view received a last-minute shake-up on Friday when the featured bout between Stephen “Wonderboy” Thompson and Michael Pereira was nixed.  Thompson and Pereira were slated to meet in a welterweight bout, which was one of the featured fights on the pay-per-view portion of the UFC 291 fight card. That was before Pereira missed weight. A former middleweight, who has missed the welterweight mark in the past, Pereira weighed 174 pounds at Friday’s official UFC 291 weigh-in.