Complex sentence: King was an undersized end for the Irish and he was known for his athleticism and speed, before he came to the football team for punt returns he was on the track team and basketball team where he was named captain in 1916.
Split into simpler sentences: King was an undersized end for the Irish and was known for his athleticism and speed. Before he came to the football team for punt returns he was on the track team and basketball team, where he was named captain in 1916.