"I wanted to shed a spotlight on this man," Johnson said after listing some of Kerr's accomplishments. "What I think is so interesting about Mark Kerr's story is, yes, he achieved so much in his life: He was a smashing machine, undefeated for a long time, but also like all of us, and like a lot of these fighters, he battled these demons—these demons of addiction, these demons of mental health, these demons of getting out and the pressure of fighting in front of 50,000 people and what that does to somebody. Here's a guy who has gone through it all, hit rock bottom. But the best part about Mark Kerr is that, like all of us in this room and all these fighters, these warriors, is that every day, we get up and we want to do a little bit better tomorrow than we did today."