Titans declared MLB Barrett Ruud (groin) inactive for Sunday's game against the Bills. The Titans can afford to play it safe with Ruud as rookie Colin McCarthy continues to impress. Meanwhile, Jared Cook passed his concussion tests and is a full go. The rest of the Titans' inactives: QB Rusty Smith, WR Donnie Avery, T Byron Stingily, C Kevin Matthews, DT Zach Clayton and CB Tommie Campbell.