5 Signs That Brock Lesnar Is Retiring From WWE After Summerslam 

#3 Nothing left to prove

Let's be honest. What else is there for Brock Lesnar to prove in The WWE?

Let's be honest here.

Between four runs with The WWE title and his historic over a year run with The Universal Title, there is really nothing left for Brock Lesnar to prove in the squared circle. He even defeated The Undertaker at WrestleMania 30, and absolutely massacred John Cena at a previous edition of Summerslam, which is something not a lot of superstars can claim.

In the end, Lesnar might not have held every belt The WWE had to offer, but what point would there be in coming back to do that? He also has main-evented WrestleMania several times and came away as the champion one time as well. If nothing else, there is nothing left to prove in WWE, but a lot to still prove in UFC!