Ezekiel "Kell" Brook (born 3 May 1986) is a British professional boxer. He held the IBF welterweight title from 2014 to 2017, and has challenged once for a unified middleweight title in 2016. At regional level he held the British welterweight title from 2008 to 2010. In May 2017, Brook was ranked as the world's best active welterweight by The Ring magazine. As of September 2019, he is ranked as the world’s eighth best active light middleweight by BoxRec, ninth by the Transnational Boxing Rankings Board and tenth by The Ring magazine.
Brook had his first amateur fight at age 12 under the guidance of Brendan Ingle. At the end of his amateur career, he had won 31 of his 36 fights, winning two Amateur Boxing Association of England titles and two National Association of Boys Clubs British Boxing Championships and a Gold medal in the 4 Nations. An early inspiration for Brook was Naseem Hamed, who was also trained by Ingle at the same Wincobank gym.