UNC Offensive Lineman William Barnes Ready To Be An Impact Player Posted Apr 15, 2021 Entering his fourth season in Chapel Hill, the time has arrived for William Barnes to be an impact player on North Carolina's offensive line. “We're really excited about William," UNC head coach Mack Brown said on Tuesday (Video). "He's really lost a lot of weight. He's working really hard with our nutritionist to keep it down. He's gotten much stronger." (Inside Carolina)