4. Rickie Fowler (USA, Age 22)
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After an impressive amateur career at Oklahoma State University, Rickie Fowler has quickly become one of the most popular players on the PGA Tour.
Fowler put in several impressive performances in his first couple of seasons on the PGA Tour including three runner-up finishes. In his first full season on tour in 2010, he was awarded the PGA Tour Rookie of the Year.
Also that year, Fowler was chosen as a captain’s pick for the US Ryder Cup team. He was just 21 at the time, making him the youngest US Ryder Cup player ever.
He didn't let the team down either. Fowler famously birdied the last four holes in his singles match with Edoardo Molinari to halve the match.
In this year’s Open Championship, Fowler had his best finish in a major when he came in tied for fifth, and he backed that up with yet another second place tour finish at the WGC-Bridgestone Invitational.