James Vincent Michael O'Brien, better known by his nickname
Jomboy, is an American baseball commentator, YouTube creator, and internet personality. Jomboy rose to prominence on the internet in 2019 when he created a viral video showing with subtitles what New York Yankees manager Aaron Boone appeared to be saying during an argument with a baseball umpire. O'Brien, his YouTube channel, and his eponymous company
Jomboy Media, gained further prominence when he published a series of videos appearing to demonstrate how the Houston Astros were stealing signs in 2017. O'Brien is known for his ability to read lips and use videos to explore sports topics in a light-hearted and goofy style.