Complex sentence: Ritson then went on to have fourteen operations over the next year several of which nearly left him dead, eventually he made a full recovery but was never the same and retired from the game later that year at the age of twenty.
Split into simpler sentences: Ritson then went on to have fourteen operations over the next year, several of which nearly left him dead. Eventually he made a full recovery but was never the same and retired from the game later that year at the age of twenty.