‘Linebacker Marvin Jones helped recruit Buffalo Bills linebacker Sam Cowart to Florida State several years ago. On Sunday, the two will lead their respective defenses in a battle for the AFC East Division lead. Jones, an eighth-year pro, leads the Jets with 21 tackles. Cowart, in his third season, tops the Bills with 28 tackles. "It’s a challenge," a smiling Jones said yesterday. "I’m an older guy. I have to try to outplay the young guy." "Everybody wanted to be like Marvin," Cowart has said. "He was the best collegiate linebacker I’ve ever seen."’