Complex sentence: On 1 June, Grayson Hart was added to the North America squad, in addition to the Argentina-South Africa squad, to cover the injured Chris Cusiter, while Mark Bennett was also added to the North America squad to cover the injured Alex Dunbar.
Split into simpler sentences: On 1 June, Grayson Hart was added to the North America squad, in addition to the Argentina-South Africa squad, to cover the injured Chris Cusiter. While Mark Bennett was also added to the North America squad to cover the injured Alex Dunbar.