Arizona State senior Jon Rahm won two matches Thursday to advance to the U.S. Amateur quarterfinals at Olympia Fields.
Rahm, the Spanish player who tops the world amateur ranking, beat Wake Forest freshman Cameron Young of Scarborough, New York, 7 and 6 in the second round, and topped Xavier of Ohio freshman Daniel Wetterich of Cincinnati 3 and 1 in the third.
Rahm will face Virginia junior Derek Bard of New Hartford, New York, on Friday. Bard beat former Vanderbilt player Hunter Stewart of Lexington, Kentucky, 2 and 1 in the third round.
In the other upper-bracket quarterfinal, Matthew Perrine of Austin, Texas, will play Japan's Kenta Konishi. Perrine transferred to Baylor after a year at Auburn.
In the round of 16, Perrine beat 37-year-old Todd Mitchell of Bloomington, Illinois, 4 and 3; and Konishi topped Michigan sophomore Kyle Mueller of Watkinsville, Georgia, 2 up.
In the lower bracket, NCAA champion Bryson DeChambeau of SMU will play former UAB player Paul Dunne of Ireland; and Charleston Southern junior Austin James of Canada will meet Southern California sophomore Sean Crocker of Westlake Village, California.
DeChambeau, from Clovis, California, beat Stanford junior Maverick McNealy of Portola Valley, California, 3 and 2; Dunne edged former Colorado player David Oraee of Greeley, Colorado, 3 and 2; James beat UCLA senior Jake Knapp of Costa Mesa, California, 2 and 1; and Crocker outlasted Alabama junior Robby Shelton of Wilmer, Alabama, in 20 holes.