Complex sentence: He went 15-6 with a 4.04 ERA his only season in the Reds' farm system, after which he and Woodie Fryman were traded to the Chicago Cubs for Bill Bonham.
Split into simpler sentences: He went 15-6 with a 4.04 ERA his only season in the Reds' farm system. After which, he and Woodie Fryman were traded to the Chicago Cubs for Bill Bonham.