There is a serious possibility that Floyd Mayweather Jr. runs away again from probable Mayweather vs. Pacquiao super fight once again-- after all, the undefeated American has never ran out of excuses in running away from the highly in-demand, highly-anticipated bout between the top two best pound-for-pound boxers in the world.

However, it's not the end of the world if the Mayweather and Pacquiao negotations fails again for the nth time. There are a lot of other options for the Filipino-- either going down in weight or meeting others in the higher weight division in a catchweight affair.

We ranked six boxers that are atop or near the top their respective divisions. If Floyd Mayweather Jr. doesn't want another $100 million or so, these are the fighters next-in-line waiting for that big money fight. View the slideshow for prospective opponents for Pacquiao if Mayweather fails to satisfy the fight fans' cravings once again.