Complex sentence: Many wrestlers were schedule to compete at the 1993 Royal Rumble but were either replace or had left the company before the event those who were schedule to compete were Doink the Clown, Crush, Hacksaw Jim Duggan, The Mountie, and Kamala.
Split into simpler sentences: Many wrestlers were scheduled to compete at the 1993 Royal Rumble but were either replaced or had left the company before the event. Those who were scheduled to compete were Doink the Clown, Crush, Hacksaw Jim Duggan, The Mountie, and Kamala.