Major League Baseball teams have interesting promotional days, like when the Washington Nationals had Star Wars day and dressed up their mascots to look even more terrifying than usual.

This time, the Arizona Diamondbacks have stepped up to the plate with a very weirdly themed game day: GRUMPY CAT MONDAY.

Tomorrow: Grumpy Cat throws out the first pitch at the @Dbacks game. Exclusive tickets here: http://t.co/Dmlt5Mzgvg pic.twitter.com/EV0CJzYc7X — Grumpy Cat (@RealGrumpyCat) September 7, 2015

Yes, supposedly they scheduled the Grumpy Cat to throw out the first pitch because she's an Arizona native. At first, we weren't so sure how that would work out with the lack of opposable thumbs and all... (hint: it didn't work out).

An Arizona native, @RealGrumpyCat is at Chase Field to "throw" out today's ceremonial first pitch. pic.twitter.com/hcSwYgWyqp — Arizona Diamondbacks (@Dbacks) September 7, 2015

Grumpy Cat looked like she had an amazing time. She made it into the clubhouse.

And she made it out on the field for warmups (although "warming up" looks more like sniffing a jersey, but whatever).

@abc15 Grumpy cat getting warmed up for tonight's first pitch at the @Dbacks game! pic.twitter.com/5V2bZKjqHE — Ramsay Fulbright (@Fulbright_R) September 7, 2015

GET PUMPED FOR GRUMPY CAT MONDAYYY!!!!!

Grumpy Cat "threw" out the first pitch. It was really someone holding the ball up to her paw, and then another person quickly taking the ball and throwing it. This confirms that it still holds true that cats cannot throw baseballs... yet.

Grumpy cat tossing out the first pitch #BacktheDbacks A photo posted by Stephanie (@lady_steph) on Sep 7, 2015 at 1:03pm PDT

Fan reactions ranged from THIS IS AWESOME...

I just witnessed Grumpy Cat throw out the first pitch! This Labor Day is turning out to be awesome! #GoDbacks — Debbie Aguilera (@DebbieDeb805) September 7, 2015

...to HELP ME.

The dbacks just has grumpy cat throw out the first pitch. Help me now — Mariah ⚾️ (@Nsoxicated4life) September 7, 2015

Stay weird, baseball.

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SB Nation video archives: The best first pitch and the absolute worst ones (2013)