Newton Michael "Mickey" Grasso (May 10, 1920 – October 15, 1975) was an American professional baseball catcher and veteran of World War II who, after over two years as a Prisoner of War of the Germans, played all or parts seven seasons in Major League Baseball. He appeared in 322 total games for the New York Giants in 1946 and 1955, the Washington Senators from 1950 to 1953, and the Cleveland Indians in 1954. The Newark, New Jersey, native stood 6 feet (1.8 m) tall and weighed 190 pounds (86 kg); he batted and threw right-handed.

Grasso had played only one season in the minor leagues when he enlisted in the United States Army in January 1942, six weeks after the Attack on Pearl Harbor. He rose to the rank of technical sergeant and was assigned to the 34th Infantry Division when he was taken prisoner in Tunisia in February 1943 during the North African Campaign. Grasso was eventually interned in a POW camp in Fürstenberg (Oder), 68 miles (109 km) southeast of Berlin. In the waning days of the war, in April 1945, as he was being marched westward by his captors, Grasso was one of ten allied prisoners who escaped German custody and the invading Soviet Red Army and was rescued by American troops.