Kamaru Usman had a nearly impossible decision to make Wednesday morning ... travel nearly 8,000 miles and fight Khamzat Chimaev on 9 days notice, and now the former welterweight champ is opening up on why he decided to step in against one of the most dangerous men in the world!
"I leave training and I get the call from [manager Ali Abdelaziz] and I'm immediately excited. That's where you are, you're excited about what could potentially be," 36-year-old Usman told Babcock on the "TMZ Sports" show on Friday (airs weekdays on FS1).