Longtime MLB umpire and native Iowan Don Denkinger dies at age 86

Loyal to the Royals, Hoping for a Renaissance - The New York Times

Don Denkinger, longtime MLB umpire, dies at 86

Don Denkinger, umpire from Iowa whose stellar career was overshadowed by blown call, dead at 86

Denkinger's missed call, 10/26/1985

Obituaries - Latest Reports on Celebrity Deaths - Page 2

Don Denkinger, longtime MLB umpire, dead at 86

Longtime MLB umpire Don Denkinger dies at age 86

Don Denkinger Cause of Death: How did veteran MLB umpire die?

St Louis Cardinals Team News, Fixtures and Results

Kansas City Royals - Wikipedia

Ex-umpire Don Denkinger, remembered for blown call, dies at 86

October 26, 1985: Royals force Game 7 after Cardinals' collapse in wake of Denkinger's call – Society for American Baseball Research

Major league umpire Don Denkinger dead at 86