Bob Costas is no stranger to dropping references to rap music. Just last year, he made an excellent reference to an old Ludacris song that name-checked him in the middle of an interview. And last night, he made yet another rap reference when he noticed that someone was holding up this sign in the middle of the Mariners/Yankees game:

Check out the video above to hear Costas quote a line from Jay Z's "99 Problems." We're impressed.

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[via For The Win]