"The numbers weren't astounding for Chiefs running back Thomas Jones, but offensive coordinator Bill Muir said Friday that he saw improvement from Jones as the season drew to a close. This seemed to contradict the notion that Jones, 33, is out of steam, both this season and perhaps in his career. Jones averaged nearly 4 yards per carry the past two weeks, nearly a full yard more than his season average of 3.2. "Like Ponce de Leon, he's found the Fountain of Youth. He works his butt off, and he has taken care of himself," Muir said.The Chiefs will need a productive game from him Sunday because running back Jackie Battle is out because of a foot injury."