Look it up.
It could very well be embellishing for this interview to make Sanders seem more impressive, but he was so good that you wouldn't have to do that.
And the only time you don't block a guy purposely would be the playside safety, and that'd only be sometimes. Everyone else is accounted for unless it's a read play (they didn't do that back then) or maybe a trap. Aside from backside defenders, you get a hat-on-a-hat wherever the ball is going.