- 5 years old - Colt
- First Dude - Lady Elite by Mr. Greeley
- A and J Racing Stable LLC
- David Dotolo
- Pennsylvania, US by Best A Luck Farm LLC
- My Rating:
O'brien is a 5 year old colt and has raced from 2020 to 2022. He was sired by First Dude out of the Mr. Greeley mare Lady Elite. He was trained by David Dotolo and has raced for A and J Racing Stable LLC, and was bred in Pennsylvania, United States by Best A Luck Farm LLC. O'Brien has raced and won at Monmouth Park, Parx Racing.