On May 31, the Reds purchased pitcher Bill Hallahan from the St. Louis Cardinals. Hallahan, who had spent ten seasons with the Cardinals, had a 2-2 record with a 6.32 ERA with the club in 1936. His career record with St. Louis was 93-68 with a 3.82 ERA in 259 games. In 1931, he led the National League with 19 victories. On the same date, Cincinnati sold pitcher Tony Freitas to the Cardinals. Freitas had a 0-2 record with a 1.29 ERA in four games with the Reds.