#3 Conor McGregor
Let's entertain the fact that GSP is willing to drop down to 155 pounds a little further. If that truly is the case then we know what's coming next.
Probably the biggest money fight that we could have ever seen in the world of MMA in Conor McGregor Vs Georges St. Pierre.
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While even the thought of this fight sends a tingling sensation down my spine, the fact remains that it is extremely hard to make considering McGregor's ongoing (failed?) negotiations with Mayweather for a super fight.
Also the fact that whoever loses will be letting go of major momentum and in the case of McGregor, it has been hard to regain especially after his unprecedented loss to Nate Diaz.
While there is no shortage of hard fights for McGregor in the lightweight division, GSP will need to tread the landscape of division jumping a little more carefully since his legacy will be on the line against a new contender.