Jamaica has also produced several world class amateur and professional boxers including Trevor Berbick and Mike McCallum. First-generation Jamaican athletes have continued to make a significant impact on the sport internationally, especially in the United Kingdom where the list of top British boxers born in Jamaica or of Jamaican parents includes Lloyd Honeyghan, Chris Eubank, Audley Harrison, David Haye, Lennox Lewis and Frank Bruno, Donovan "Razor" Ruddock, Mike Tyson, and Floyd Mayweather Jr., whose maternal grandfather is Jamaican.