Deebo Samuel: the walking first down who has broken the idea of NFL positions

This season, the San Francisco 49ers' opponents have come up against a player who can run the ball with brute strength and catch it with ballet-like grace

Every once in a while a player comes along who redefines their position.

We've seen positionless defensive players, hybrid safety-linebacker types. We've seen corners who can play in the slot or happily kick out to the boundary. Over the past decade, we've seen the rise of the polar bears, tight ends as adept at mauling fools in the run-game as they are running down the field as their team's finest receiver.