On 4 April 2010, Tseng won the first major championship of the LPGA season, the Kraft Nabisco Championship, by one stroke.
She went on to win her second major of the year on 1 August 2010 by winning the Women's British Open by one stroke and became the youngest woman in the modern era to win three major championships.
LPGA founder Patty Berg was younger than Tseng when she won the 1939 Titleholders Championship.
However, that was before the formation of the LPGA Tour in 1950 and the designation of official LPGA major tournaments.

In September 2010, Tseng was offered a five-year sponsorship deal from a Chinese company worth NT$1 billion (US$25 million) with access to a luxury villa and private jets.
Tseng rejected the offer because it required she switch her citizenship from Republic of China to China.
On 4 April 2010, Tseng won the first major championship of the LPGA season, the Kraft Nabisco Championship, by one stroke. She went on to win her second major of the year on 1 August 2010 by winning the Women's British Open by one stroke and became the youngest woman in the modern era to win three major championships. LPGA founder Patty Berg was younger than Tseng when she won the 1939 Titleholders Championship. However, that was before the formation of the LPGA Tour in 1950 and the designation of official LPGA major tournaments.
In September 2010, Tseng was offered a five-year sponsorship deal from a Chinese company worth NT$1 billion (US$25 million) with access to a luxury villa and private jets. Tseng rejected the offer because it required she switch her citizenship from Republic of China to China.
Yani Tseng