Dern has won four straight fights (and three Performance of the Night bonuses in that span), while Rodriguez has posted two straight wins (and one Performance of the Night bonus).
Check out the UFC Vegas 39 results below.
Main card (ESPN+ at 4 p.m. ET)
Mackenzie Dern vs. Marina Rodriguez
Randy Brown vs. Jared Gooden
Prelims (ESPN+ at 2 p.m. ET)