The Dallas Mavericks hope Dirk Nowitzki will get fans fired up and sell some tickets.
In a parody of the popular Hump Day commercial, Dirk struts through the Mavs office asking people what day it is.
"Guess what day it is. Guess what day it is, huh? Anybody?" he says. "Hey Cash, guess what today is. Game Day. What! What!"
It's a promotion to sell season tickets.
The Mavs open the regular season at home against Atlanta on Oct. 30.
KDFW FOX 4
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