Football Art Running Back Charcoal Drawing

Preliminary drawing for a large painting that you can see further down on this blog. The drawing is 24" x 18" charcoal on paper.. Number 28 running back. I’m not sure who this art represents. Three good ones come to mind. Marshall Faulk running back for Indianapolis Colts, St. Louis Rams, running back Darrell Green, Washington Redskins or running back Curtis Martin who played for the New England Patriots and the New York Jets.