Rivers (リヴァーズ, Rivaazu) is a member of the Bellamy Pirates. He is the sniper of the crew, and the one wearing the hat with long ear-flaps. In the manga, it was he who stopped Sarquiss from going after Luffy and not Eddy. He is voiced by Patrick Seitz in English Funimation dub.
First Appearance: Chapter 223; Episode 146

Source: http://onepiece.wikia.com/wiki/Rivers