Unbeaten, top-ranked welterweight contender Errol Spence Jr. (21-0-0, 18 KOs) looks to win his first world title this Saturday, May 27, 2017 when he faces 147-pound world champion Kell Brook (36-1-0, 25 KOs) from Sheffield, England. Watch live on Showtime at 5:15 pm ET/2:15 pm PT.