American Collin Morikawa won the PGA Championship on Sunday, outshooting a world-class field to capture his first major title by two strokes. The 23-year-old from California fired a six-under-par 64 final round at TPC Harding Park in San Francisco to finish 72 holes on 13-under 267. Morikawa drove the green at the par-4 16th to set up an epic eagle that provided his margin of victory. js/rcw