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ABC13's sports reporter Bob Slovak tweeted a video of fans in Washington D.C. singing "Take it back DOO-DOO-DOO-DOO-DOO-DOO!"
Nationals fans have been heard hundreds of times singing, playing or dancing to Baby Shark after a win.
SEE MORE: Baby Shark hitting the road for 100-date tour
Nationals' player Gerardo Parra uses the notorious Baby Shark as his walk-out song. According to Major League Baseball's website, it's been Parra's walk-up song since June.
But honestly, we like our version way better!