UFC 291正式称重，“天秀哥”米歇尔·佩雷拉(Michel Pereira)

UFC 291称重精华，本卡共有两人超重。

“天秀哥”米歇尔·佩雷拉(Michel Pereira)：174磅，超3磅；梅根·奥利维 (Megan Olivi) 在称重对视前宣布，天秀对阵“天秀哥”米歇尔·佩雷拉(Michel Pereira)的比赛取消了。

维尼修斯·萨尔瓦多（Vinicius Salvador）：128.5磅，超出2.5磅；罚20%出场费给CJ·维加拉(C.J. Vergara)，比赛继续

UFC 291选手完整版称重结果如下：

Dustin Poirier (155) vs. Justin Gaethje (156)

Jan Blachowicz (205) vs. Alex Pereira (205.5)

Michel Pereira (174)* vs. Stephen Thompson (170.5)

Tony Ferguson (155) vs. Bobby Green (155.5)

Michael Chiesa (170) vs. Kevin Holland (169.5)

Gabriel Bonfim (170) vs. Trevin Giles (170)

Derrick Lewis (263.5) vs. Marcos Rogerio de Lima (262)

Roman Kopylov (185) vs. Claudio Ribeiro (185.5)

Darrius Flowers (170.5) vs. Jake Matthews (170)

Vinicius Salvador (128.5)** vs. CJ Vergara (125.5)

Uros Medic (170.5) vs. Matthew Semelsberger (169.5)

Priscila Cachoeira (125) vs. Miranda Maverick (125.5)