James Robert "Loafer" McAleer (July 10, 1864April 29, 1931) was an American center fielder, manager, and stockholder in Major League Baseball who assisted in establishing the American League. He spent most of his 13-season playing career with the Cleveland Spiders, and went on to manage the Cleveland Blues, St. Louis Browns, and Washington Senators. Shortly before his retirement, he became a major shareholder in the Boston Red Sox.