I think everyone here studies mma grappling. It's a big part of why this exist.
You named three of the best wrestlers in the game as examples of people who use single legs. You also forgot to mention maia, khabib, and Cormier. Gregor Gillespie too. I remember cain using a fair amount of them as well. I think lovato went mostly for singles against gegard but I only watched that fight once.
I'm having a harder time thinking of guys who don't use singles.
i feel at hw and lhw singles work better than doubles due to guys not havig as good of balance as smaller guys and its harder t lock hands around bigger guys hips takes alottt of energy to finish a double on a big guy so yeah cain and dc were high crotch monsters in mma if eel they both realized that being they were small hws
i dont see gillespie hitting many singles tbh he usually doubles and sags on guys from what i seen to get them down
yeah maia without question when gets his hands locked gets his dump finish i was just stating that the very top guys who have sucess finishing the single is chris weidman
maia and weidman use head outside singles colby and usman use head inside singles tbh i dont like head inside singles for mma i feel you have to wrestle alot more to finish automatically guy whizzers starts ahnd fighting/controling wrist which is why jake sheilds seemed to be the first good bjj/grappler type to start using head outside since msot guys unless wrestled for a long time didnt have good answers to it no whizzering hand fighting is much harder to do and u can chain it to a double or crotch lift easy
yeah from what iv noticed colby and usman are only guys who are top wrestlers who use a head inside single colby usually either tree tops the guy with a trip or just runs them down with a knee tap havent notice usman ever finish a single but he gets it and pushes guys to fence with it then goes to work with clinching