Picture from Bob Levey / Getty Images The Tennessee Titans have announced that Texans Defensive Coordinator Mike Vrabel has been hired as their new head coach. The Titans have stated they will introduce Vrabel Monday during a news conference. The Texans lost their defensive coordinator, but this may open up the spot for Romeo Crennel to become the new defensive coordinator for the team. Many inside sources believe Crennel will take the position, leaving the Texans no extra vacancies on the defensive coaching side.             The Texans had Vrabel throughout O’Brien’s tenure, but Vrabel has been a head coach candidate...