Atthaya Thitikul has reached No. 1 in the world prior to her 20th birthday, joining Lydia Ko as the only two players in LPGA history to accomplish the feat.
Ko first reached No. 1 at 17 years old. Thitikul is 19 and still in her rookie season on the LPGA. The only other player to reach No. 1 as a rookie was Sung Hyun Park in 2017.
Thitikul jumped Jin Young Ko to move to No. 1. Ko has spent a total of 152 weeks at No. 1, leaving her just six weeks short of Lorena Ochoa’s record.