The Los Angeles Angels announced the dismissal of Justin 'Boomer' Prinstein, a scout whose nickname 'The Baseball Spy' had become synonymous with a controversial episode that unfolded during a three‑game series against the Colorado Rockies in early June.
A Spy in the Dugout
According to league sources, Prinstein was caught on video recording Rockies coaches as they communicated pitch signals from the dugout, a practice that the league has long prohibited. The footage, captured on a personal phone, was spotted by a Rockies staff member and immediately flagged to MLB officials.
The Angels’ general manager, Perry Minasian, confirmed that Prinstein was terminated on the spot and issued an apology to the Rockies’ front office, emphasizing that the club had acted swiftly once the breach was reported. No disciplinary action was taken against the Angels themselves, but the episode has reignited debate over the use of covert technology in baseball.
Prinstein’s career has spanned international scouting stints in South Korea and a brief consultancy with Scouts Consulting Group LLC before he joined the Angels in December. Earlier in his career he worked as an international scout for the Cincinnati Reds and even hosted a short‑lived podcast titled 'The Baseball Spy', where he dissected the Houston Astros sign‑stealing scandal and the league’s ban on recording devices.
The incident also brought renewed attention to the Rockies’ own sign‑calling method, which involves coaches relaying pitch information from the dugout — a practice that some analysts argue creates a gray area for potential exploitation. Rockies pitching coach Alon Leichman later joked that it would be 'absolutely hilarious' if teams attempted to steal signs in such a manner, underscoring the league’s ongoing sensitivity to any form of electronic assistance.
While the Angels sit at the bottom of their league this season, the episode serves as a reminder of the fine line between legitimate scouting and illicit signal‑stealing. As MLB continues to monitor the use of broadcast angles and data analytics, the league’s stance remains clear: any attempt to gain an unfair advantage through hidden technology will be met with swift disciplinary measures.