Qualifying medalists Sam Horsfield and Sean Crocker won their opening matches Wednesday in the U.S. Junior Amateur at The Club at Carlton Woods.

The 17-year-old Horsfield, from England, routed David Laskin of Elk Grove, California, 5 and 4 on the Nicklaus Course, and the 17-year-old Crocker, from Zimbabwe, beat Dylan McCabe of Sioux City, Iowa, 1 up.

On Thursday, Horsfield will face South Korea's Won Jun Lee, and Crocker will play John Augenstein of Owensboro, Kentucky. Lee topped John Mancinotti of Toledo, Ohio, 4 and 3, and Augenstein beat Keenan Huskey of Greenville, South Carolina, 1 up.