The rematch is on.  Today BJ Penn signed the bout agreement for an immediate title rematch with Frankie Edgar at UFC 118 in August 28th in Boston.

The two fought to a judges decision in their first encounter at UFC 112 in Abu Dhabi last month with Edgar pulling off the upset by getting the nod and becoming the new champion, though some believed that Penn had done enough to retain his lightweight title.

Check out Penn signing the contract for the fight below.

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