The MLB The Show 23 Captain Edition on PlayStation includes:

A copy of the full game for PlayStation 5 and PlayStation 4
New Era MLB The Show 9FIFTY limited edition cap
Limited edition SteelBook
Four days early access
Double daily login rewards (for the life cycle of MLB The Show 23)
Additional digital items:
Captain’s Choice Pack (x1)
To be announced Choice Pack (x1)
To be announced Uniform Choice Pack (x1)
Gold Choice Packs (x2)
Show Packs (x5)
Ballplayer Pack (x1)
Derek Jeter Cover art bat skin (x1)
10,000 Stubs