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Mighty Mouse is out at UFC 201. USATSI

The man they call Mighty Mouse needs a break. Demetrious Johnson, who was scheduled to take on Wilson Reis at UFC 201 as the c0-main event, suffered an injury in training camp and was forced to withdraw. It is unknown what the injury is, but it is severe enough to know he will be unavailable for the fight scheduled to take place on July 30.

Johnson is currently riding a nine-fight winning streak and is undefeated since dropping down to flyweight (125 pounds) and claiming the title. Reis (20-6) is 3-1 since moving to flyweight and earned a shot at the belt after beating Dustin Ortiz by unanimous decision in January.

This marks the 23rd main or co-main event for a UFC event that has required a change. A replacement fight has yet to be announced. UFC welterweight champion Robbie Lawler and Tyron Woodley are scheduled to headline the event in Atlanta on July 30.