About Dan O'Brien, Sr.
Lived 1929 – 2017 (aged 87). Dan O'Brien, Sr. was an American military personnel.
Daniel Francis O'Brien Sr. (March 26, 1929 – January 16, 2017) was an American professional baseball executive who served as the general manager of the Texas Rangers, Seattle Mariners and California Angels of Major League Baseball (MLB).
Biography Born in Elizabeth, New Jersey, O'Brien was a graduate of Thomas Jefferson High School. He attended Seton Hall University and graduated from Florida Southern College, where he played varsity baseball and basketball. He served in the United States Army during the Korean War and was discharged in 1954.
Don’t just read it —
keep it.
Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.
- E-book
- Audio
- Video
Instant download · yours to keep · every purchase keeps this site free
Important facts
Family & relationships
People in Dan O'Brien, Sr.'s life
Named in this biography and alive at the same time
Related people
Same field, nearest in time
Contemporaries
People whose lives overlapped Dan O'Brien, Sr.'s
Frequently asked questions
Who was Dan O'Brien, Sr.?
American baseball executive (1929-2017)
When was Dan O'Brien, Sr. born?
Dan O'Brien, Sr. was born on 26 March 1929 in Elizabeth.
When did Dan O'Brien, Sr. die?
Dan O'Brien, Sr. died on 16 January 2017 in Dallas, Texas.
What was Dan O'Brien, Sr.'s occupation?
Dan O'Brien, Sr. was a military personnel.
What nationality was Dan O'Brien, Sr.?
Dan O'Brien, Sr. was American.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Dan O'Brien, Sr.. https://biography.guide/dan-o-brien-sr/
MLA: "Dan O'Brien, Sr.." Biography.guide, https://biography.guide/dan-o-brien-sr/.
Chicago: "Dan O'Brien, Sr.." Biography.guide. https://biography.guide/dan-o-brien-sr/.
Data last updated: 2026-09-22 · Spot an error? Report a correction.
Page generated 2026-09-27 05:12 UTC