Beno doesn't have that high of a standard to live up to. If he comes in and doesn't make too many mistakes, he is going to be graded well because his job is to keep the team afloat. If he does more than that -- like hit a few shots or make some good passes -- he's going to grade really well.
Parker as the starting point guard and the guy in control of the ball for the Spurs most of the time, probably has to do the most to live up to expectations. For him to qualify as having a good game, he has to score 20+ points, shoot well, pass well, push the ball well, defend well and limit turnovers.