Arley Wilbur Cooper was an American starting pitcher in Major League Baseball who played most of his career for the Pittsburgh Pirates. A four-time winner of 20 games in the early 1920s, he was the first National League left-hander to win 200 games. He established NL records for left-handers – second only to Eddie Plank among all southpaws – for career wins (216), innings pitched and games started (405); all were broken within several years by Eppa Rixey. His career earned run average of 2.89 is also the lowest of any left-hander with at least 3000 innings in the NL. He still holds the Pirates franchise records for career victories (202) and complete games (263); he also set club records, since broken, for innings (3201), strikeouts (1191), and games pitched (469).

The Marion Diggers were a minor league baseball team based in Marion, Ohio and Marion County, Ohio. From 1908 to 1912, the Diggers played as members of the Class D level Ohio State League, hosting home minor league games at Webb Park. Despite not winning a league championship, the Diggers finished in the top three in the final standings in each full season of play. Future president Warren Harding was a part owner of the Marion Diggers.