St. Louis Cardinals team ownership history – Society for American Baseball Research
Longtime St. Louis Cardinals, MLB writer Rick Hummel dies at 77 - ESPN
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Rick Hummel, esteemed St Louis-based baseball writer, dies at 77
Manager Oliver Marmol wears jersey as tribute to writer Rick Hummel: Cardinals Extra
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How did Rick Hummel die? Cause of death explored as beloved St. Louis Cardinals writer passes away