Joe DiMaggio was just a prospect when he stepped onto the field at Yankee Stadium 80 years ago, on May 3, 1936, for his first big-league game. He went three for six with a triple, an RBI, and three runs scored. The three-time AL MVP and 13-time All-Star won 10 World Series titles over 13 seasons in pinstripes. His greatest year? Who can say? Was it 1937, when he drove in 167 runs? Or '39, when he hit .381? Or '41, when he hit in 56 straight? What is certain is that he never had a bad season. When asked once why he gave it his all in every game, DiMaggio replied, "Because there might be somebody out there who's never seen me play before." Here are some classic photos of "The Yankee Clipper."