Australian Curtis Luck birdied the third playoff hole to beat local favorite Nick Carlson in the semifinals of the U.S. Amateur on Saturday.
Luck will face Brad Dalke in Sunday's 36-hole final at Oakland Hills. Dalke defeated Jonah Texeira 3 and 2.
Carlson, who is entering his sophomore year at Michigan, was 1 up when his drive on No. 18 ended up under a tree. Luck needed only a bogey to take that hole and square the match.
The playoff began on No. 10. Both players parred that hole and birdied No. 11 before Luck was able to reach the green in two on the par-5 12th. Carlson missed a putt for birdie from about 20 feet, ending the match.