Rashad Evans routinely dealt ass whoopin's to MMA legends like Rampage Jackson, Chuck Liddell, Michael Bisping, Forrest Griffin and Tito Ortiz -- but who's the absolute toughest dude he fought?
And, it ain't even close ... "Suga" Rashad -- the latest member of the UFC's 2019 Hall of Fame class -- tells TMZ Sports.
"Without a doubt, Jon Jones. When it comes down to it, I think that Jon Jones is the best in history.