Former WWE referee Mary Elias made an appearance on SportsKeeda Wrestling to discuss a wide range of topics.
During it, he was asked about how WWE picks the referees for matches as well as him working the match between Shawn Michaels and Undertaker at Wrestlemania 25:
When I first got there, that was done by the senior officials. At the time, there were a couple. We had Mike Chioda and we had Nick Patrick. Mike Chioda was the RAW referee and Nick Patrick was the SmackDown referee. When ECW was there, it was Scott Armstrong. They would be the ones who would make all the assignments and either give you a dark match or a main event. If you were in your hometown, you always got the main event. That was always something that was cool.
Anytime we were in L.A at The Staples Center, The Honda Center, or anywhere near L.A., I was always blessed with getting the main events in L.A. It was always cool to have my family there and they got to see that. Thats pretty much how that went, but prior to me leaving, I know that was done by John Laurinaitis. Then again, more times than not, you would have people like Shawn Michaels or Chris Jericho who would request a certain referee. They would ask either Mike Chioda or Nick Patrick at the time, or John Laurinaitis that they would really like to have Mary Elias referee their match. Thats how I got the Undertaker-Shawn Michaels WrestleMania 25 match. Shawn Michaels went to John Laurinaitis and said, I want Marty as the referee, and low and behold, we made history.
H/T to WrestlingNews.co for the transcription