Just days after LA Angels signed Shohei Ohtani we began to see news regarding a surprise revelation; Shohei Ohtani is dealing with a minor UCL sprain. Back in October he received a preventative plasma injection, a common and simple procedure in Japan. This medical information was disclosed to all teams during the courting process and in no way did Ohtani attempted to deceive teams into signing him.
Reports that the MLB is investigating this matter began with Buster Olney breaking the news on Twitter the morning of December 14th. There’s no reason to assume the leak came from a rival ball-club, but at the same time it’s hard to imagine anyone outside the MLB would leak Ohtani’s medical records.