Entering professional baseball in 1939, Lambert made his Major League debut on September 14, 1941.[2] His only decision came 10 days later when the Phillies lost to the New York Giants, 2–0, at Shibe Park.[3] He served in the United States Army during World War II from 1943 to 1945.[4][5] Following his military service, he went back to baseball spending 1946 in the minor leagues.[2]