Kayla Harrison: 'It's going to be a long night' for Ketlen Vieira at UFC 307
On the same night Harrison faces Vieira, Pennington (16-8 MMA, 13-5 UFC) defends her belt against Julianna Peña (11-5 MMA, 7-3 UFC) in the co-main event. Harrison will be ready to jump in if any of the fighters fall out, but she’ll have to hit 135 pounds on the dot in order to be eligible.