 In 1947 Marrero went 25–6 and led the league in wins (25), complete games (28), strikeouts (251), shutouts (seven) and ERA (1.66).On July 12, 1947, Marrero pitched a no hitter against the Tampa Smokers, allowing only one base runner on a hit by pitch.The Cubans finished in first place with a 105–45 record.