Duangmanee is making his first Championship start in 2026. Earlier this year, the University of Virginia senior finished runner-up for his school in both the Puerto Rico Classic and Southern Highlands Collegiate. In 2025, he earned Honorable Mention All-America honors following his second collegiate season at Virginia, finished T-8 in the Northeast Amateur in Rhode Island and reached the round of 16 in the U.S. Amateur in California. His older brother, George, was the Boys 12-13 champion in the 2015 Drive, Chip and Putt National Finals at Augusta National Golf Club.