MMA Fighters

recognised a few UFC fighters (Dan Henderson) some of the other actors looked like MMA men, looked up a few but I haven't seen them fight

how many are there? is there any other film with more in? didn't even realise the lead was one

the actual film wasn't that good, things just happened for no reason, maybe an editing problem, seemed like there were bits missing, though the fights scenes were very good, brutal in fact