Casimir James Konstanty was an American professional baseball relief pitcher in Major League Baseball and National League Most Valuable Player of 1950. He played for the Cincinnati Reds (1944), Boston Braves (1946), Philadelphia Phillies (1948–1954), New York Yankees (1954–1956) and St. Louis Cardinals (1956). Konstanty batted and threw right-handed, stood 6 feet 1 inch (1.85 m) tall and weighed 202 pounds (92 kg).