It's been almost a year-and-a-half since Welterweight champion Georges St. Pierre—who many pundits and fans think is the greatest mixed martial artist in the world—last fought in the Octagon.

Last April, he decidedly took out submission specialist and former Strikeforce Middleweight champion Jake Shields to defend his Welterweight strap, but tore his ACL in the process.

In the meantime, “The Natural Born Killer,” Carlos Condit, has taken the UFC Welterweight division by storm, fending off the division's top contenders and besting Nick Diaz to win the interim title made available due to GSP's layoff.

With GSP fully recovered however, the UFC will unify those two belts on Saturday night and crown an undisputed Welterweight champion.