This week, FOOTBALL NOW examines the separate roles of managers and head coaches. It’s rare for someone to come along and alter how a sport is played. That’s what Clark, who handed Pete Maravich’s scoring report Sunday, has done. Michael Smith and Michael Holley react to the Boston Celtics’ crunch-time loss to the Cleveland Cavaliers, questioning if the team has bigger points to look at in late-game situations. There’s not lots of choices at QB for needy teams in free company. Defensive sort out Chris Jones posted a photograph on social media Thursday of Andy Reid celebrating the Super Bowl…