Here are the fight night weights from UFC 331.
Biggest gains by weight gain %:
Joanderson Brito: 145.5 鉃★笍 171.4 (18%)
Michael Aswell Jr.: 146.0 鉃★笍 170.8 (17%)
Joshua Van 125.0: 鉃★笍 145.8 (17%)
Mauricio Ruffy: 155.0 鉃★笍 178.0 (15%)
Full weights for all fighters 猬囷笍