James Robert "Loafer" McAleer (July 10, 1864 – April 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.His career ended abruptly.