Maryville was associated with a roster of signed baseball figures spanning 1926 to 1975, including George Govenat of Sioux Falls, SD, in the Nebraska State League; Robert "Bob" Boken of the Washington Senators and Chicago White Sox in the American League; John "Buster" Lucas of the Boston Red Sox in the American League; John Drost of Sioux Falls, SD, in the Nebraska State League; Mike Semanisin of Norfolk, NE, in the Nebraska State League; Al Krupski of Martinsville, VA, in the Bi-State League; John "Jess" Brussatti of Omaha, NE, in the Western League; Walter "Red" Schuerbaum of Springfield, MO, in the Western Association; Dwain Sloat of the Brooklyn Dodgers and Chicago Cubs in the National League; Joe Garnero of Mayfield, KY, in the Kitty League; Lloyd Zarr of the Belleville Stags in the Mississippi-Ohio Valley League; Robert "Bob" Heller of McAlester, OK, in the Sooner State League; and Ken "Obie" Oberkfell of the St. Louis Cardinals, Atlanta, Pittsburgh, San Francisco, and Houston in the National League, and the California Angels in the American League. It also honors the memory of Mike and Isabell Semanisin.