Sean Mattison is an American former professional surfer and current professional surf coach and mastermind behind Kelly Slater's "nubster".
A fifth fin that was created by Mattison that some critics say helped Kelly Slater win his 11th ASP World Championship.
Mattison also is the designer of his own alternative high performance surfboards and surfboard fins named Von-Sol.In 2009 Assistant Coach Sean Mattison along with Head Coach Ian Cairns founder of the Association of Surfing Professionals coached the 2009 USA Surf Team to a Gold Medal in the 2009 ISA World Championships.
Prior to that win, the USA had not won a Gold Medal since 1996.
in Costa Rica; France: 2nd Place, Australia: 3rd Place.