Original sentence: Despite a relatively successful first season, he was not slated to start regularly for the Red Sox, who already had two "superb" left-handed pitchers, according to Creamer: the established stars Dutch Leonard, who had broken the record for the lowest earned run average (ERA) in a single season; and Ray Collins, a 20-game winner in both 1913 and 1914
Edited sentence: Despite a relatively successful first season, he was not slated to start regularly for the Red Sox, who already had two stellar left-handed pitchers: the established stars Dutch Leonard, who had broken the record for the lowest earned run average (ERA) in a single season; and Ray Collins, a 20-game winner in both 1913 and 1914