Did a little tape on Gastelum/Hermannson. Not seeing the Hermannson love as much as others here.
His striking is okay, he has good leg kicks. But his boxing isn't that slick, he mostly uses it to close distance to get his grappling game going. He's a good grappler, fundamentally sound and has a great guillotine. But he's not as good as Weidman was in his prime, and that's the only guy who's ever clearly out grappled Gastelum (I say clearly because Magny did at 170 but that was back and forth and not decisive, both had their moments). In addition, Weidman was a monstrous MW, just huge compared to Kelvin. Jack is more an average sized MW.
Kelvin's performance against Till was baffling, but in hindsight Till deserves a lot of credit for mixing things up and keeping Kelvin guessing. Rewatching that fight, Till did a lot of things well and didn't take stupid chances like he was prone to doing in the past. I think Till's slick boxing and ability to get his head off the center line surprised Kelvin. It's still concerning given it was Kelvin's last fight, but I don't want to put TOO much stock in it. I don't think Hermannson can replicate that style either, he's not the boxer that Till evidently is. (I called Till overrated for a long time but THAT version of Till impressed me a lot).
Kelvin is insanely durable, never finished by strikes and only once subbed (again, by Weidman who was a BEAST grappler and gigantic MW). Jack has been finished in 4 of his 5 losses (though yes, Cannonier and Santos are monsters at MW and huge punchers to be fair). Izzy had Kelvin hurt but Kelvin survived, he's just a super tough, durable kid. Can't see Jack hurting him with strikes and definitely can't see him finishing (or at least I think it's very unlikely). Kelvin meanwhile has some power, even as an undersized MW. Put away Belfort, Bisping, and Kennedy. Him hurting Jack with punches seems very possible to me if there are pocket exchanges.
I'm definitely playing Gastelum NSC at -150. Should be north of -200 imo, I think it's twice as likely Kelvin finishes as Jack does. I think I'll also take a stab at Kelvin dec +205 too. Admittedly, Kelvin's apparent indifference vs Till does concern me a little, but I think that's a one-off. I think it's likely this fight sees the cards and is pretty close. At over 2-1, I'm willing to take a small shot that Kelvin's superior boxing wins out over Hermannson's leg kicks and likely forward aggression.