I love a good submission expert, as long as they arn't just laying around hoping someone will come down to them. McLovin practically won against Kos, and at 22yo I think the sky is the imit for this kid. He's still got some work to do on his striking, but I think it's pretty clear that his biggest weakness at this point in post-fight interviews lol. There's plenty of time to figure it all out.
Sick, sick armbar- seriously.
Also, props to Berkman for holding him off until the second. That was some pretty solid sub defense.