Cory McKenna earned the eighth Von Flue choke finish in UFC history on Saturday at UFC on ESPN 40. McKenna (7-2 MMA, 2-1 UFC), who at 23 years old is the youngest female fighter on the UFC roster, got a finish with a rarely-utilized grappling technique against Miranda Granger (7-3 MMA, 1-3 UFC) in their strawweight bout at the UFC Apex in Las Vegas. The Welsh fighter overcame a 10-inch reach advantage by taking her opponent down all through the first round and into the second. Granger made a technical error defensively and allowed McKenna to lock in the submission…