AL West Rivals Mariners and A's Trade Shots in Spring Training Twitter Battle

With less than three weeks until Opening Day, American League West rivals Seattle Mariners and Oakland Athletics appear ready to battle.

Seattle tried to get its fans excited for Felix Hernandez's World Baseball Classic start against the United States (and for the regular season) on Wednesday by tweeting out a King Felix hype video. It just so happened that the video ended with a Mariners catcher handing an A's batter a K balloon after a strikeout—and you better believe Oakland noticed.

And off they went:

What a great invention Twitter turned out to be.

[Twitter]