Matt Bonner used to be one of the most divisive players on the Spurs, in part because he rarely looked like he was impacting the game all that much but always seemed to have a great plus/minus, which led to a fantastic net rating. The advanced stats seemed to say that the team was much, much better with him on the floor than off, no matter what the eye test or his counting stats said. He was the plus/minus king.
It appears he might have an heir to the throne. Keita Bates-Diop has the best net rating on the team by a mile among rotation players, which seems almost inexplicable.