Casey Yu-Jin Phair is a South Korean professional footballer who plays as a forward for NWSL club Angel City FC and the South Korea national team. She was the youngest player to ever feature in a FIFA Women's World Cup, having made her debut in the tournament in 2023 at the age of 16 years and 26 days old.

The South Korea women's national football team represents South Korea in international women's football competitions. The South Korean women's team has qualified for four FIFA World Cups in 2003, 2015, 2019 and 2023.