Complex sentence: He returned after only in six weeks to play against St. Patrick's Athletic but may have overdone it and was forced to rest which allowed Dave McMillan to kick off a goal-scoring streak that has made him first choice again.
Split into simpler sentences: He returned after only in six weeks to play against St. Patrick's Athletic. He was rested though for the following game which allowed Dave McMillan to kick off a goal-scoring streak that has made him first choice again.