Golf review of 2015: Jordan Spieth, 'Gimmegate' & the year's other ups and downs
Golf's generational shift gathered unstoppable momentum in 2015 as Jordan Spieth, Jason Day and Rory McIlroy became the dominant stars at the top of the men's game.
This youthful trio pushed the sport into a new era and established stars faded from prominence, with Tiger Woods and Phil Mickelson leading the retreat of the older order.
It proved one of the most compelling periods in recent times and there was plenty that made 2015 memorable and significant.