Kevin just got dropped by Michal though, might've lost that one if Olek wasn't a complete novice on the ground.
Kevin can be a very game guy, but looking at his past wins since his wrestling first got exposed he's only beaten a bunch of washed up guys and Michal, and had some shaky moments against some of those. Chiesa, Means, Cowboy Oliveira, Ponz... that's not stellar competition for a ranked guy imo. Roman's also a big, physical guy so I can 100% see him using that to control Kevin against the cage in the worst case scenario, he's also very durable and tricky on the mat himself.
Maybe speed does kill him and he ends up getting outpointed or finished for the first time, but I expected the fight to be at evens or a slight edge for Roman personally, so I have to take a stab at it.
As far as Aldo goes, that's fair, but a three rounder + his power make me think he can get Mario's respect early and force some openings to take two rounds.
I'm thinking the size difference will help him muscle Kevin around, but him going balls to the wall early and tanking everything to find something on the feet could be viable given how Kevin's chin seems shaky sometimes.