'Walking away a great' - Crawford retires from boxing

Five-weight boxing world champion Terence Crawford announces his retirement at 38 with a perfect record of 42-0, citing having nothing left to prove in the sport. Crawford made history by becoming the first male fighter in the modern era to hold undisputed titles in three weight divisions after defeating Saul 'Canelo' Alvarez. The American boxer started his professional career in 2008 and won titles in lightweight, light-welterweight, welterweight, and light-middleweight throughout his career, culminating in his final victory over Alvarez.