When he worked his Wrestlemania match against Triple H, Sting made a request to management. He wanted Charles Robinson, whom he was very familiar with from their time together in WCW, to be the referee. WWE gladly obliged. It is interesting to note that when he worked his title match at Night of Champions against Seth Rollins, Robinson was not the referee for the match.
October 24, 2015
Since the company badly wanted to bring him on board, there were several stipulations that Sting required from WWE. One of them was not on the contract, but the front office gave it to him anyways because they wanted him to be as comfortable as possible. The WCW legend requested that Charles Robinson be the referee for his match at Wrestlemania with Triple H. The two of them worked together for years.
March 30, 2015