sentences:  He played seven seasons in the National Football League (NFL) for the Chicago Cardinals (1943), the Boston Yanks (1945–1948), and the Los Angeles Rams (1948–1949).Currivan also played for "Card-Pitt" in 1944, a team that was the result of a temporary merger between the Cardinals and the Pittsburgh Steelers.The teams' merger was result of the manning shortages experienced league-wide due to World War II.