The Guthrie Brothers perform in South Amboy By Submitted Content - July 25, 2017 Jeb Guthrie (back left) and Jock Guthrie [cq] (back right), of The Guthrie Brothers, perform for the crowd gathered at the Music-in-the-Parks Summer Series held at Raritan Bay Waterfront Park in South Amboy on July 19. FacebookTwitterEmailPrint The crowd gathers together for the Music-in-the-Parks Summer Series held at Raritan Bay Waterfront Park in South Amboy on July 19.▲Jeb Guthrie (left) and Jock Guthrie [cq] (right), of The Guthrie Brothers, tune their guitars prior to performing for the crowd gathered at the Music-in-the-Parks Summer Series held at Raritan Bay Waterfront Park in South Amboy on July 19.▲Jock Guthrie [cq], of The Guthrie Brothers, tunes his guitar prior to performing for the crowd gathered at the Music-in-the-Parks Summer Series held at Raritan Bay Waterfront Park in South Amboy on July 19.▲