Kamaka/Brown
Kamaka has all the makings of a good prospect.. For a round and a half, the drop off is noticeable. I think a big part of the problem is just his pacing, very high volume in round one, usually does good damage and can even stun and drop guys but the finish isn't there and then he's just gradually slowing over the next two rounds. Clear areas to work on, obviously the gas, his striking defence isn't great - he tends to drop his hands after exchanges and as he exits the pocket and this gets way more exploitable as the rounds go on. He has the right ideas in place though, he generally will exchange and then clinch and push to the cage when his opponent starts to fire back, but again as he slows he starts to go more and more to either the high guard or the clich and takes more and more damage there. Good combinations, finishes everything with a kick to the body or leg, good kicks up the middle, good body work generally, especially when he is fresh in the clinches, times takedowns well against the cage too and uses them to create some breathing space but really doesn't have a top game at all, but I'm knit picking.
I think Brown is pretty sub or bust here, Kamaka should school him standing and Brown seems to get stunned or dropped most fights, I don't think he has a threatening enough striking game to push Kamaka back so he's likely going to be fighting on the back foot the majority of the time making it harder for him to shoot, got his legs chewed up by Chavez and probably goes again here along with getting worked to the body. Brown is going to be relying on surviving early, and going to the third and putting the pressure on there, seems like a fairly narrow path and his offensive wrestling isn't good enough that he will be able to have early success with it, actually wouldn't be surprised to see Kamaka take him down and just sit in the guard at the end of rounds, not sure where Kamaka trains? But it seems like with the right coaching and camp he could fill some of those holes and really have a pretty decent all round game.
Personally bet Kamaka at 1.57 for 3 units.