Daniel F. 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).
دان أوبراين سينيور (بالإنجليزية: Dan O'Brien, Sr.) هو عسكري أمريكي، ولد في 26 مارس 1929 في إليزابيث في الولايات المتحدة، وتوفي في 16 يناير 2017. (ar)
Daniel F. 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). (en)