Bloomfield Hills, Mich. ? Ricky Barnes of Stockton, Calif., used a dazzling combination of power and finesse to beat Hunter Mahan 2 and 1 on Sunday in the 102nd U.S. Amateur Championship at Oakland Hills CC.

Barnes, 21, who will be a senior at Arizona, won the final three holes in the morning round of the scheduled 36-hole final, building a 2-up lead he never relinquished. He increased his lead to 4-up after 26 holes.

Mahan, of McKinney, Texas, a 20-year-old junior at Oklahoma State, made a late charge, narrowing the gap to 2-up with a fist-pumping 50-foot eagle putt at No. 12, the 30th hole.

Barnes, the son of former New England Patriots kicker Bruce Barnes, upped it back to 3-up with a 10-foot birdie on the 31st hole, but Mahan responded with a 27-foot birdie putt on No. 15, the 33rd hole to cut the gap to 2-up again.

“I’m on top of the world right now,” said Barnes. “I’m sure we will stay up and have some fun tonight.

“I bet you a few up-and-downs might have surprised him a little bit,” added Barnes, who trailed in four of his six matches. “Sometimes, I even surprise myself out there.”