Birthday boy Nowitzki doesn't need to be reminded of his age

Today is Dirk Nowitzki's 39th birthday!

... But feel free to leave out the number when sending him your well wishes.

The legendary Dallas Mavericks big man has made a habit of taking to Twitter to crack jokes at his expense as he ages and slows down. He did it again Monday to celebrate turning 39 years young.

Related: Nowitzki leaps at another opportunity to make fun of his regression

Birthday boy Nowitzki doesn't need to be reminded of his age
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