Felix Thaddeus Mackiewicz (November 20, 1917 – December 20, 1993) was an American professional baseball player. An outfielder, he appeared in six Major League Baseball seasons for the Philadelphia Athletics from 1941 to 1943, the Cleveland Indians from 1945 to 1947, and the Washington Senators in 1947. The native of Chicago, Illinois, threw and batted right-handed. He stood feet 2 inches ( m) tall and weighed pounds ( kg).