It was popping up for four or five days when I visit here, but has since disappeared over the last two or so and not recurred (so far).
It was just a strange very generic popup with no branding asking to download the "Arizona Sports Fan Forum" application. I saw something very similar when visiting a couple other sites that you wouldn't expect would have dedicated applications.
This was all on my Android phone by the way, not via a regular computer. It looked very fishy and I assumed it was either some kind of malware enticement or some weird new functionality in Chrome.
I just thought I should inquire if anyone knew that it was legit or otherwise give some notice that there could be malware potentially generating via some element of the website.