Thaddeus Shideler

{{short description|American hurdler}}

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{{MedalSport | Men's athletics}}

{{MedalCountry | the {{USA}} }}

{{MedalSilver| 1904 St. Louis | 110 meters hurdles}}

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Thaddeus Rutter Shideler (October 17, 1883 – June 22, 1966) was an American hurdler who competed in the early twentieth century. He competed in athletics at the 1904 Summer Olympics and won a silver medal in the 110 meters hurdles. Fred Schule won the gold medal.{{cite web|url=https://www.olympedia.org/athletes/79034 |title=Thaddeus Shideler |work=Olympedia |access-date=January 17, 2021}}

Competing for Indiana University, Shideler held an unofficial world record set a month before the 1904 Summer Olympics with a time of 15.0 seconds in the 100 meters hurdle. The watch of one of the three timers failed to start costing Shideler official verification for the mark.{{cite book |editor1-first=Bob |editor1-last=Hammel |editor2-first=Kit |editor2-last=Klingelhoffer |title=Glory of Old IU: 100 Years of Indiana Athletics |url=https://books.google.com/books?id=8uobLCQZlhAC |accessdate=December 28, 2011 |year=1999 |publisher=Sports Publishing LLC |isbn=9781582610689 |pages=11 }}