text: A running back will have all three attributes you have said, sometimes they are the fastest of the three positions and other time they are the strongest. \nMost quarterbacks will have the least of these three attributes. I say most because of guys like, Michael Vick and Vince Young, they are exceptions. \nWide receivers will have speed more than anything. They tend to be lighter in weight and taller.\n\nBest in their postions:\nRunning back: LaDainian Tomlinson, great speed, strength and agility and can catch passes well too. He is the whole package when it comes to running backs.\nQuarterback: Peyton Manning, smart, great arm and knows the games.\nWide receiver: Steve Smith, undersized but plays big. Great hands, speed and runs great routes.