Drew Weaver, winner of Britain's Amateur championship at Lytham, has failed to make the American Walker Cup team for Royal County Down.
The 20-year-old Virginia Tech golfer is only second-reserve in a side in which the last two places have gone to teenage college students - Rickie Fowler (18) from Murrieta, California, and world ranked 19-year-old, Kyle Stanley, of Washington's Gig Harbour
Fowler, a freshman at Oklahoma State, has won two big tournaments already this season, one of them with a prodigious score of 24-under-par.
George Marucci, America's non-playing captain, clearly believes in giving youth its chance.
Take out Texas veteran Trip Kuehne, who played in the same losing side as George at Porthcawl 12 years ago, and the average age of this US squad defending the cup is 20 years and seven months, probably the youngest on record.
Colt Knost (22), the new US Amateur champion, was already in Marucci's original choice of eight golfers named three weeks ago. He's a neighbour of TV analyst David Feherty in Dallas and beat Tucson's Michael Thompson in an exciting final at the famous Olympic Club in San Francisco.
Thompson, ranked 13th among the world's best amateurs, is first reserve for Newcastle, where Marucci and his team are due on Sunday, thus allowing themselves plenty of practise time before the September 8-9 match.
The full American side is: Billy Horschel, Dustin Johnson, Chris Kirk, Jamie Lovemark, Jonathan Moore, Webb Simpson, Knost, Stanley, Fowler and Kuehne.
Rory McIlroy, at 18, is the youngest player in Britain's team, the average age of which is 23.