Kultida Woods, the mother of Tiger Woods, golf’s biggest star, died Tuesday, according to the 15-time major winner. He did not provide give her cause of death.

Tiger Woods announced over social media that his mother, Kultida, died on Tuesday morning. Woods did not reveal a cause of death for his mother, who reportedly was responsible for the 15-time major winner wearing red as his signature look in final rounds on Sundays.

She instilled Tiger Woods’s dominant spirit and encouraged him to wear a red shirt on Sunday as his power color.