Complex sentence: Morgan was due to play a major role on another Joseph Parker undercard in April 2016, but it was postponed and instead decided to fight as the headliner at the Addington Raceway against experienced Daniel Maxwell over ten rounds for the vacant New Zealand national welterweight title.
Split into simpler sentences: Morgan was due to play a major role on another Joseph Parker undercard in April 2016, but it was postponed. He instead decided to fight as the headliner at the Addington Raceway against experienced Daniel Maxwell over ten rounds for the vacant New Zealand national welterweight title.