Complex sentence: The initial length of the injury ruled him out for four to six weeks, and despite setbacks, the club stated he could still make his AFL debut in 2014, until he was placed on the long-term injury list in May.
Split into simpler sentences: The initial length of the injury ruled him out for four to six weeks, and despite setbacks, the club stated he could still make his AFL debut in 2014. This was ruled out when he was placed on the long-term injury list in May.