Washington - 2021 Spring Training Treasure Hunt: CLUE 2

PLEASE NOTE: The previous Clue was INCORRECT! Below is the CORRECT version.
(The webmaster is SORRY for this mistake.)

May 5 (Wednesday)

To improve your plan, you’ll need to obtain the code.
But you don’t need another four digits to find the treasure’s abode.
It could be for your eyes only with determined success
Decipher this clue and become Dr. Yes.