Pretty much anyone who makes it at RB in the NFL has at least a bit of bamma in him, by definition of the position. Obviously you can't have someone like Adrian Peterson as a bamma, cause he's the best athlete on the field and one of the most gifted to ever play the position, even though he runs hard as fuck. Ottis Anderson is the perfect example, and Marshawn doesn't really run away from anyone, though they are very good players by any measure. Maybe BenJarvus Green-Ellis as another current one? Dude is a pretty productive starting back and I am certain he wouldn't beat 80% of NFL DEs in footrace.