Posey played four seasons at Ohio. In his freshman year, Posey had 54 tackles, eight passes defended, two
interceptions and two forced
fumbles. On September 8, 2007, he recorded five tackles and a pass defended against
Louisiana–Lafayette as Ohio won the game 31–23. On September 15, 2007, Posey recorded three tackles against 18th ranked
Virginia Tech but Ohio lost 28–7. On September 22, 2007, he recorded four tackles and an interception against
Wyoming but
Ohio lost 34–33. On September 29, 2007, Posey recorded five tackles against Kent State but Ohio lost 33–25. On October 13, 2007, he recorded 6 tackles against
Eastern Michigan as Ohio won with a final score of 48–42. On October 20, 2007, Posey recorded seven tackles, two forced fumbles, and two passes defended against
Toledo with Ohio losing the game 43–40. On October 27, 2007, he recorded five tackles, one interception and one passes defended against
Bowling Green as Ohio won 38–27. In his sophomore year, Posey had 14 tackles and two passes defended for the season. In his junior year, Posey had 29 tackles, six passes defended and two interceptions (with one scoring a
touchdown). On September 26, 2009, he recorded four tackles against
Tennessee State which Ohio lost 34–23. On October 3, 2009, he recorded three tackles against
Bowling Green with Ohio winning the game 44–37. On October 10, 2009, he recorded five tackles and one pass defended against Akron as Ohio won 19–7. On October 17, 2009, Posey recorded 3 tackles against
Miami as Ohio scored 28 to the RedHawks' 7. On October 24, 2009, Posey recorded two tackles and one interception which he returned for 58 yards against
Kent State but Ohio recorded a loss of 20–11. He started in the game against
Northern Illinois and recorded an interception which he returned for touchdown for 41 yards. In his senior year, he finished the year with 46 tackles and a fumble recovery for a touchdown. On September 4, 2010, he recorded 2 tackles, one pass deflection, and a fumble recovery which he returned for 38 yards for the touchdown against
Wofford. ==Professional career==