Complex sentence: Lemoncello had to withdraw from the 2006 Commonwealth Games in Australia due to commitments at FSU, Lemoncello had exams and the NCAA Indoor Championships in the days leading up to the games and would not have had sufficient time to acclimatise in order to perform at his best.
Split into simpler sentences: Lemoncello had to withdraw from the 2006 Commonwealth Games in Australia due to commitments at FSU. He had exams and the NCAA Indoor Championships in the days leading up to the games and would not have had sufficient time to acclimatise to perform at his best.