 At this point, he was 4–0 against the Yankees, earning him the moniker "Yankee Killer" from sportswriter Chester L. Smith of the "Pittsburgh Press".Although his ERA of 4.88 was considered high, it was due in large part to his loss against the Kansas City Athletics who scored six earned runs in just two innings.On July 4, he defeated the Yankees once again, making him 5–0 against them in his career, and 7–4 overall for the 1957 season, and had lowered his ERA to 4.02.