Stars are very subjective and change constantly depending on who is recruiting a player. For the most part the star system is beneficial and fairly accurate. However, we have all seen 5 star busts and guys who were walk-ons become superstars. I don't really put much faith in the star ratings because they don't account for how well a player responds to tough competition. Manziel seems to relish the spotlight and plays lights out in big games. Being rated a 3 star may have also given him the push to prove them wrong. Murphy probably did not play against the toughest competition but he certainly seems to rise to the occasion. Let's all hope he continues to get better and better as the season progresses!