Jack Clark (baseball) - Wikipedia
Jack the Ripper Clark: 4x All-Star, 2x Silver Slugger - Italian Americans in Baseball
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Jack Clark – Society for American Baseball Research
Jack Clark - DEADLINE Private Signing - STL Sports Collectors
Jack Clark, a Cardinal of the 1980s, Disdains the Mets of That Era - The New York Times
Jack Clark – St Louis Sports Hall of Fame
CardCorner: 1984 Topps Jack Clark