Japan's Hideki Matsuyama continued his strong start in the new U.S. PGA season on Thursday, with a first-round 66 that left him two back of the provisional leaders in a tie for fourth place at the Shriners Hospitals for Children Open.Japan's Hideki Matsuyama continued his strong start in the new U.S. PGA season on Thursday, with a first-round 66 that left him two back of the provisional leaders in a tie for fourth place at the Shriners Hospitals for Children Open.