Complex sentence: He joined the Super Rugby referees panel for the 2016 season, and refereed his first match in Super Rugby on 9 April 2016, between the Stormers and Sunwolves.
Split into simpler sentences: He joined the Super Rugby referees panel for the 2016 season. He referred his first match in Super Rugby on the 9th of April, between the Stormers and Sunwolves.