Brock Lesnar vs. Diverticulitis on Newsfeed - On one side we have Brock Lesnar the Ultimate Fighting Champion Heavyweight Title Holder and on the other we have Diverticulitis, a crappy stomach Disease! Diverticulitis is the swelling of an abnormal pouch in the intestinal wall. He has suffered from it since 2009 and some speculate that it’s from steroids while others credit his massive size and lifestyle. What do I think? Well Lesnar gets repeatedly punched it the face for a living…you got this. Plus shen asked about their upcoming fight Diverticulitis looked at one photo of him and said uh oh…(pic of Lesnar Fighting all bloody).