If you've spent any time on TikTok or Instagram in the last year, you've probably seen it: fans at baseball games crushing nine hot dogs and nine beers across nine innings, filming the whole ordeal for internet glory. It's called the 9-9-9 challenge, and it went from a scrappy DIY fan experience to an officially sanctioned MLB stadium food item seemingly overnight. Here's what the challenge is, where it came from and whether the official version lives up to the hype created online. What Is the '9-9-9 Challenge?' The 9-9-9 challenge started the way the best internet trends do - organically.