Claressa Shields -- the greatest boxer in the world -- is now undefeated in TWO sports after winning her pro MMA debut on Thursday with an incredible 3rd round stoppage!!
The 26-year-old took on Brittney Elkin at PFL 4 in New Jersey. FYI, Elkin is a brown belt in Brazilian jiu-jitsu!
As the fight started, it was clear Elkin's plan was to take Shields to the ground and try to force the boxer to tap out.
Elkin's plan worked during the first 2 rounds -- smothering Shields and attempting to submit her with arm-bar attempts and other holds.