Bill O’Brien adds Mike Vrabel to Texans’ staff

Mike Vrabel is heading to Houston as a member of Bill O’Brien’s Texans staff. Vrabel confirmed on Twitter that he is leaving his current job as an Ohio State assistant to take over as linebackers coach in Houston. The 38-year-old Vrabel played for the Steelers from 1997 to 2000, the Patriots from 2001 to 2008…