Fourteen-year-old Robby Shelton of Wilmer, Ala., won twice Thursday to advance to the quarterfinals at the U.S. Junior Amateur Championship.
Denny McCarthy of Burtonsville, Md., and Gavin Hall of Pittsford, N.Y., also advanced to the quarterfinals after the delay, along with Richard Jung of Toronto, Justin Thomas of Goshen, Ky., Scott Wolfes of St. Simons Island, Ga., Jim Liu of Smithtown, N.Y. and Anthony Paolucci of Del Mar, Calif.
Shelton, a high school sophomore, won the final two holes to beat defending champion Robby Spieth of Dallas 1-up in the second round of match play in the morning on the Classic Course at Egypt Valley Country Club.
After rain delayed play for two hours in the afternoon, Shelton defeated Andrew Lister of Haymarket, Va., 3 and 1 in the third round. Lister needed 21 holes to beat Stephen Behr of Florence, S.C., in the second round.
McCarthy, 17, advanced to the third round with a 3 and 2 victory over Curtis Thompson of Coral Springs, Fla., who shot 10 under to win medalist honors in the two qualifying rounds. McCarthy won the first hole and led throughout the match against Thompson, and then beat Devon Purser of Clearfield, Utah, 1 up.
The 15-year-old Hall, who shot a 10-under 62 in Tuesday's final qualifying round, beat Alexander Schauffele of San Diego 1 up and then defeated Jonathan Garrick of Atherton, Calif., 5 and 3.
The quarterfinals are scheduled for Friday morning, followed by the semifinals in the afternoon. The 36-hole championship match is set for Saturday.