Pat O'Brien (racing driver)

Pat O'Brien was an American race car driver active in the early to mid-20th century. He is primarily known for his participation in the Indianapolis 500, a prominent event in the American open-wheel racing scene. O'Brien competed in multiple Indianapolis 500 races, though details of his career, including specific finishes and team affiliations, are sometimes limited to mentions in historical racing records. His career coincided with a period when racing was often a more regional and less documented sport compared to modern racing series, making comprehensive biographical information difficult to obtain. He is part of the historical tapestry of drivers who contributed to the legacy of the Indianapolis 500 and American motorsports.