Shohei Ohtani's Dodgers pitching debut was available to Ippei Mizuhara during his first night in prison, TMZ Sports has learned.
A Federal Bureau of Prisons spokesperson tells us ... at the Federal Correctional Institution Allenwood Low in Pennsylvania -- where Mizuhara was taken into custody this week -- inmates did have access to MLB Network, which broadcast the highly anticipated Dodgers vs. Padres game.

It's unclear, of course, if Mizuhara tuned in .