Complex sentence: Score was traded to the Chicago White Sox after the season, and pitched parts of the following three seasons before retiring, finishing with a career record of 55--46 and a 3.36 ERA and 837 strikeouts over eight seasons, in 858 1/3 innings pitched.
Split into simpler sentences: Score was traded to the Chicago White Sox after the season, and pitched parts of the subsequent three seasons before retiring. Score finished with a career record of 55--46 and a 3.36 ERA and 837 strikeouts over 8 seasons, in 858 1/3 innings pitched.