 Since the phaseout of the fullback position, more white halfbacks have been included in the NFL; in addition to Hillis and Gerhart, Danny Woodhead, Brian Leonard, Chase Reynolds, Rex Burkhead, Zach Zenner and Christian McCaffrey have all seen playing time at the position since 2010.At the start of the 2013 season, 23 of the 32 starting quarterbacks (72%) in the NFL were white.Whites slightly outnumber blacks in the makeup of offensive linemen (49% vs 46%) yet the "center" position is 82% white.