Complex sentence: First, Mayo Smith managed the Reds to a 35-45 start, before being replaced in mid-season by Fred Hutchinson, who led the club to a 39-35 record the rest of the way.
Split into simpler sentences: First, Mayo Smith managed the Reds to a 35-45 start. He was replaced in mid-season by Fred Hutchinson, who led the club to a 39-35 record the rest of the way.