GAMETIME: Jay-Z Shows Off His Custom Yankee Fitted

Yankee apparel co-branded with Jay-Z's embroidered-on logos hit shelves a few weeks ago.  But Jay showed off his own custom version of his Yankee fitted.

Check out pics of Mr. Carter rocking his lyrically lined Yankee cap at last night's game when you read on...

His line from "Empire State of Mind" is lined inside the bib of his Yankee fitted--"I made the Yankee hat more famous than a Yankee can."  Jay kicked it in Alex Rodriguez's VIP seats for the game last night.  And he looked like he had a good time with his fellas:

This Championship replica ring is ridic.

We have 2 guesses on who he's texting...