Complex sentence: But the Yankees were in a downward spiral, finishing sixth in the'65 American League race and they won only four of their first 20 games in 1966, resulting in Keane's firing and Benson's resignation on May 7.
Split into simpler sentences: But the Yankees were in a downward spiral at the time, finishing sixth in the'65 American League race. Then they won only four of their first 20 games in 1966, resulting in Keane's firing and Benson's resignation on May 7.