SANDWICH, England—American debutant Collin Morikawa produced an ice-cool final round to win the British Open by two strokes on a blazing hot afternoon at Royal St George’s on Sunday.
The 24-year-old began the day a stroke behind Louis Oosthuizen but played picture-perfect golf in a four-under round of 66 to overhaul the South African and resist resurgent fellow American Jordan Spieth in a three-way battle.
