Lions running backs Jahvid Best and Mikel Leshoure are both on track to participate in the team's offseason program after season-ending injuries last season. Best was placed on season-ending injured reserve in November after he couldn't shake the lingering effects from a concussion he sustained Oct. 16 against the 49ers. Leshoure, the team's second-round pick who was expected to compliment Best, missed the entire season after tearing his Achilles' tendon during training camp.