Complex sentence: He played a crucial role in Cincinnati's 1961 National League championship, when he won 19 of 28 decisions, with an earned run average of 3.10, second in the National League after Warren Spahn.
Split into simpler sentences: He played a crucial role in Cincinnati's 1961 National League championship. That season he won 19 of 28 decisions, with an earned run average of 3.10, second in the National League after Warren Spahn.