Complex sentence: He was invited to the senior club's training camp for the 1987--88 season and although he was deemed too young and not yet ready for the Soviet League, Bure earned minimal playing time filling in for absent regulars.
Split into simpler sentences: He was invited to the senior club's training camp for the 1987--88 season. Although he was deemed too young, and not yet ready, for the Soviet League, Bure earned minimal playing time filling in for absent regulars.