SAN FRANCISCO -- Tennessee teenager Jackson Herrington birdied the 18th hole to beat local favorite Niall Shiels Donegan on Saturday to advance to the U.S. Amateur final at The Olympic Club.

Herrington won 1 up and will face Georgia teenager Mason Howell in the 36-hole final Sunday. Howell beat Eric Lee 3 and 2 in the other semifinal at the 125th U.S. Amateur.

Both Harrington and Howell advanced to the final after being among the 17 players to survive a 20-man playoff Wednesday morning to determine the final 64 for match play.

The matches teed off in typical summer San Francisco weather with heavy fog that made it difficult to track shots, along with a steady mist and wind gusts of more than 20 mph.

Herrington got in an early hole after bogeying the first two holes against Donegan, the

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