Masters champion Jordan Spieth clinched his second successive major title in thrilling style with a one-shot victory in the 115th U.S. Open at Chambers Bay on Sunday. Spieth began the final round in a four-way tie for the lead and birdied two of the last three holes for a one-under-par 69, before fellow American Dustin Johnson (70) missed a four-foot birdie putt on the 18th green to miss out on a playoff. The 21-year-old Spieth posted a five-under total of 275 as he became only the sixth player to slip into a green jacket and hoist the U.S. Open trophy in the same year.