On Football: Many legs to stand on

Quantity equals quality for the NFL's top five rushing teams this year. Each uses a two- or three-player rotation that keeps backs fresh within a game and within a season. Twenty-one of the 32 teams have a second running back with at least 20 carries, making players like Cincinnati's Cedric Benson a rarity. He has 111 of the Bengals' 144 carries. "I feel better as we go along," he said Thursday. "The more plays, the better. I'm just having fun with it and would have it no other way." Two other workhorse backs meet Sunday at FedEx Field: Kansas City's ... Email </a