As I searched to TIVO the Mattingly documentary, I noticed that on April 3rd at 7:00pm the MLB Network has a hour long show with Greg Amsinger & Matt Vasgersian that features lives updates and highlights of the day...
While at noon on April 3rd, they have an hour long show of MLB Presents which is a series of documentaries and profiles on some of baseball's most prominent personalities.
Maybe the Directv guide will change as we get closer to the 3rd, but as of right now, it may be starting at noontime on April 3rd instead of 7:30pm.