|Harry J. O'Brien|
|Born||October 31, 1884|
New Haven, Connecticut
|Died||August 23, 1955 (aged 71)|
|Head coaching record|
Harry Joseph O'Brien (October 31, 1884 – August 23, 1955), nicknamed "Shorty", was an American football, basketball, and baseball coach. He was the fifth head football coach for The Citadel, The Military College of South Carolina, serving for five seasons, from 1916 to 1918 and from 1920 to 1921, compiling a record of 14–15–4. O'Brien also coached basketball and baseball for The Citadel for two seasons during World War I. He tallied a record of 6–2 in basketball and 3–9 in baseball. O'Brien died of coronary thrombosis on August 23, 1955, at his home in Philadelphia.
Head coaching record
|Gettysburg Bullets (Independent) (1914–1915)|
|The Citadel Bulldogs (Southern Intercollegiate Athletic Association) (1916–1918)|
|The Citadel Bulldogs (Southern Intercollegiate Athletic Association) (1920–1921)|
|Drexel Dragons (Independent) (1922–1925)|
|†Indicates BCS bowl, Bowl Alliance or Bowl Coalition game.|
- U.S., World War I Draft Registration Cards, 1917-1918
- U.S., World War II Draft Registration Cards, 1942
- Citadel Coaching Records Lua error in package.lua at line 80: module 'Module:Webarchive/data' not found.
- The Citadel Basketball 2010–11 Media Guide Lua error in package.lua at line 80: module 'Module:Webarchive/data' not found.
- Pennsylvania, Death Certificates, 1906-1966
- "Shorty O'Brien Dies". The Evening Sun (Hanover, Pennsylvania): p. 18. August 26, 1955. https://www.newspapers.com/clip/13853264/the_evening_sun/.
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