Cotton went 8 - 5 with a 4.90 ERA for Triple - A OKC last season .
Cotton improved to 3 - 1 with a 2.82 ERA with Triple - A Nashville once Cotton was traded from the Dodgers ' system to the Athletics .
Cotton went 8 - 5 with a 4.90 ERA for Triple - A OKC last season , but he improved to 3 - 1 with a 2.82 ERA with Triple - A Nashville once he was traded from the Dodgers ' system to the Athletics .