WATCH: Cubs commercial "That's Cub"

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Chicago Cubs fans are fired up for the 2017 baseball season as their favorite team is trying to defend their crown as World Champions.

The Cubs Twitter account showed a short but impressive commercial of Kris Bryant working hard this spring. Check out the cool video below.

Don't let it get to your head. #ThatsCub pic.twitter.com/n7r2YiNUND

— Chicago Cubs (@Cubs) March 30, 2017

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