National League outfielder Enos Slaughter gets two hits, scores twice and robs Harvey Kuenn of an extra-base hit. August August 5 - Don Larsen of the St. Louis Browns pitches a complete game, a 5-0 loss to the Boston Red Sox. However, he goes 3 for 3 at the plate, in the process establishing a consecutive hits record for pitchers with seven. August 30 – In game one of a doubleheader, Jim Pendleton hit three home runs, as the Milwaukee Braves beat the Pittsburgh Pirates at Forbes Field, 19–4, while tying a major league record for the most home runs in a single game with eight, held by the New York Yankees since 1939. Besides, Pendleton became only the second rookie in history to hit three home runs in one game, joining his teammate Eddie Mathews, who hit it just a year earlier. In the second of the twin bill, the Braves hit four more long balls and crushed again Pittsburgh, 11–5. Moreover, the 12 homers in a doubleheader shattered the previous mark of nine. This time, Mathews belted four dingers for the day, which gave him a National League-leading 43. Matthews would finish the season with 47 home runs, 30 of them on the road, setting also a major league record. Previously, only the New York Yankees had ever hit more home runs in consecutive games, or in a doubleheader. The Yankees hit eight home runs in a 23–2 victory in the first game of a doubleheader, and five homers in a 10–0 win in the second game, played on June 28, 1939 against the Philadelphia Athletics at Shibe Park. September September 2 – The St. Louis Cardinals overcome a three-run inside-the-park home run by shortstop Ted Kazanski to beat the Philadelphia Phillies‚ 10–7. Rip Repulski hits his 20th home run of the season for St. Louis‚ breaking the team's rookie record set by Johnny Mize in . The Cardinals hammer 10 hits off Phillies starter Robin Roberts to hand him his 12th loss. September 12 – Carl Erskine defeats the Braves 5–2, as the Brooklyn Dodgers clinch the pennant earlier than any other team in history. September 13 – Pitcher Bob Trice becomes the first black player in Philadelphia Athletics history. September 14 – The New York Yankees clinch their 5th straight pennant with an 8–5 win over the Cleveland Indians. Second baseman Billy Martin has 4 RBIs.