Nicholas Joseph "Mickey" Witek (December 19, 1915 – August 24, 1990) was an American professional baseball player. He played all or part of seven seasons in Major League Baseball during the 1940s for the New York Giants and New York Yankees, primarily as a second baseman. A native of Luzerne, Pennsylvania, he threw and batted right-handed and was listed as 5 feet 10 inches (1.78 m) tall, and weighing 170 pounds (77 kg).