#8 Rory McIlroy: $13.6 million (4.6% increase over last year)
The only Northern Irishman on the list, Rory McIlroy MBE has 13 PGA Tour wins under his belt, including 4 major Championships (2 x PGA Championships, 1 x US Open, 1 x The Open Championship) and has been identified as the most exciting young prospect in golf.
No higher vindication of this is required than the fact that EA chose him to replace Tiger Woods in their flagship golfing video game, currently known as Rory McIlroy PGA Tour after the American fell out favour after his controversies surfaced a few years back.
He has a mega-bucks deal with Nike for their sporting apparel (reportedly 10-years, $200 million worth) and TaylorMade for their golfing equipment (reportedly 10-years, $100 million worth) and his stock is rising as every year goes by.