Complex sentence: The Reds failed to improve upon their 1956 mark during Paul's tenure, however, and after the 1960 season, Paul departed and became the first general manager of the expansion Houston Colt.45s, where he prepared for the club's 1962 debut.
Split into simpler sentences: The Reds failed to improve upon their 1956 mark during Paul's tenure, however, and after the 1960 season, Paul left the team. In 1961, Paul resurfaced as the first general manager of the expansion Houston Colt.45s, where he prepared for the club's 1962 debut.