Mousasi can fight, people are calling him one of the top pound for pound light heavyweights today. I disagree, but he's getting up there, he hasn't really fought too many people of note yet, aside from his last fight against "Babalu" Sobral, and then fights against Melvin Manhoef, and Jacare Souza. He's a very impressive fighter though, he's in the DREAM open-weight tournament semi finals right now too.
Last Friday he lost a sparring exhibition match at a M1 event to Emilianenko. I'm personally not a fan of Emilianenko, and hoping his next opponent (Brett Rogers) cracks him in the jaw and puts him to sleep.
That Cyborg/Carano card was awesome though, top to bottom.