The legendary Tennessee Titans running back made the claim to TMZ Sports ... saying if he lined up for a race against every fast NFL legend ever -- and everyone was still in their prime -- he would've dusted them all.
"No question," Johnson says.
The statement is a bold one -- after all, Sanders alone is rumored to have once run a 4.1 40-yard dash -- but Chris says he believes in his speed THAT much.
"You look at my tape, I've never been caught," Johnson says. "I made people pull hamstrings!"