MMA Romance Novels

My hubby always complains how those Greek Billionaires in my romance novels have 6-pack abs when they're very busy in the boardroom running companies.  Well, he can't complain anymore with these hot , buff men.  Apparently, MMA is a new genre in romance novels.  But it's not entirely new to me.  I've already read an MMA-theme romance book 2 years ago, Seducing Cinderalla by Gina Maxwell but I wasn't into MMA yet at that time so I'm kinda curious to read one of these now that I've started following UFC, One FC, etc.