McGregor vs. Diaz 2, Aldo vs. Edgar for interim title official for UFC 200

UFC 200 officially booked two huge fights at the top of the card, as Conor McGregor will face Nate Diaz in the main event and Frankie Edgar battles Jose Aldo for the interim featherweight title on July 9 in Las Vegas.

The announcement was made via "UFC Tonight" on Wednesday. The rematch between McGregor and Diaz also will take place at 170 pounds. McGregor’s 15-fight winning streak ended in the first bout, which was fought 25 pounds above his usual 145-pound fighting weight. 

The long-rumored rematch between McGregor and Diaz happens just a few months after their first fight broke pay-per-view records at UFC 196 in early March.

Diaz submitted McGregor with a second-round rear-naked choke to hand the Irishman his first loss in the UFC.

Almost immediately afterward, rumors started circulating that a rematch was in the works and now McGregor will attempt to avenge his loss to Diaz when they meet at the new T-Mobile Arena in Las Vegas.

With McGregor tied up in a second fight with Diaz, the featherweight division will crown an interim champion on the same night at UFC 200.

Edgar, who is widely considered the top-ranked contender in the division, will face former champion Jose Aldo with the winner earning a shot at McGregor, who won the featherweight belt last year.

Edgar fell to Aldo in a close decision in his first fight at featherweight in 2013, but since that time the former lightweight champion has won five fights in a row to position himself atop the division.

Aldo will return to action for the first time since losing to McGregor in 13 seconds at UFC 194, which was his first loss in nearly a decade. Now Aldo will attempt to earn a rematch with McGregor while wrapping a title around his waist again.

The UFC also confirmed these fights for UFC 200:

● Cain Velasquez vs. Travis Browne

● Johny Hendricks vs. Kelvin Gastelum

● Jim Miller vs. Takanori Gomi 

● Joe Lauzon vs. Diego Sanchez

UFC 200 is expected to feature multiple title fights and will have several women’s fights, Dana White confirmed, possibly including a title fight. 

The Associated Press contributed to this report.

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