4. Lydia Ko (Golf)
Lydia Ko is a Korean-born New Zealand professional golfer who became the No. 1-ranked woman professional golfer on 2 February 2015 at 17 years, 9 months and 9 days of age, making her the youngest player of either gender to be ranked No. 1 in professional golf.
Born: April 24, 1997 (age 20), Seoul, South Korea
Height: 1.65 m
Nationality: New Zealand
Race to the CME Globe: 2014, 2015
ANA Inspiration: Won: 2016
Parents: Hyeon Bong-sook, Ko Gil-hong