Jackson Herrington and Mason Howell are both Masters-bound teenagers. But only 1 can win the U.S. Amateur on Sunday.

KNOXVILLE, Tenn. (WVLT) - Tennessee golfer Jackson Herrington has advanced to the U.S. Amateur Finals after a stellar performance in the semifinals Saturday, knocking off Niall Shiels Donegan. EVERYTHING SCHOOL. Jackson Herrington is headed to the U.S. Amateur Finals pic.twitter.com/9sQ2b1WXnM

Herrington became just the seventh Tennessean to make it to the finals of the U.S. Amateur. Hillman Robbins (1957), David Gossett (1999) and Steven Fox (2012) walked away with victories, while Danny Green (1989), Luke List (2004) and Casey Whittenburg (2003) finished as runner-up.

In a teen showdown at the U.S. Am, Mason Howell, 18, of Georgia dispatched Jackson Herrington, 19, of Tennessee.

Donegan, the 49th seed, has yet to make a birdie through the first four holes in the semifinals, but he's 1 up after Jackson Herrington made two bogeys to start the day, then a birdie on the third hole. As of 3:05 p.m. ET, Donegan holds the edge.

Niall Shiels Donegan, the Scot who grew up in nearby Mill Valley, advanced to the U.S. Amateur semifinals Friday at The Olympic Club to the delight of his large, vocal gallery.

How to watch the 2025 U.S. Amateur on Sunday at the Olympic Club, including full U.S. Amateur TV coverage and streaming info for the finals.

The 125th U.S. Amateur Golf Championship at The Olympic Club has reached its final eight, and among the quarterfinalists is a name few expected to see: Jimmy Abdo, ranked No. 4,292 in the World Amateur Golf Ranking (WAGR).