Mackenzie Dern kicked off 2025 with a heaping helping of revenge. The strawweight jiu-jitsu ace submitted Amanda Ribas with a nasty third-round armbar on Saturday night in the main event of UFC Vegas 101,

Mackenzie Dern is building the momentum that has eluded her. For the first time in four years, Dern has consecutive wins. The decorated Brazilian Jiu-Jitsu star weaponized her grappling to hand Amanda Ribas her first submission loss at UFC Fight Night on Saturday.

Mackenzie Dern checked a lot of boxes Saturday when she defeated Amanda Ribas in the UFC Fight Night 247 main event. Not only did Dern (16-5 MMA, 11-5 UFC) pull off her first stoppage since April 2021,