John Anthony Reder (September 24, 1909 – April 12, 1990) was a Polish-American sportsman who, during the 1930s, played soccer with the Fall River Marksmen and the New Bedford Whalers and baseball for the Boston Red Sox. In soccer, he played as a goalkeeper and won three American Soccer League titles and two National Challenge Cup titles. In baseball, he played as a first baseman for the Boston Red Sox, and was voted Most Valuable Player of the New York–Penn League while playing for the Williamsport Grays. Together with Moe Drabowsky, Nap Kloza and Henry Peploski, Reder is one of only four Major League Baseball players to be born in Poland.