The Las Vegas Raiders hold the title of having one of the biggest fan bases in the entire world, not just in the country.

So, who are the biggest bandwagon hoppers, fair-weather fans, and team-abandoning traitors in the NFL? Here’s our ranking of the 15 least loyal fan bases in the league.

Loyalty in the NFL? That's a tricky question. Fans pour their hearts into teams ... was either the greatest play in NFL history or the biggest robbery. Franco Harris' miraculous catch-and-run ...

There are some celebrities or other former athletes from different sports that you don't associate with your team or your hometown or state that actually are pretty big fans of the local club.