World number one Scottie Scheffler ignited his bid to claim the career grand slam after a one-under round of 69 made him the main threat to US Open third-round leader Wyndham Clark.
The American is taking his first shot at trying to join the elite six-man club which Rory McIlroy was admitted to last year after winning the Masters.
For two days Scheffler went under the radar after rounds of 72 and 68 but with a number of other multiple major winners who started the day in the top 10 struggling in the toughest conditions of the week at Shinnecock Hills, the 29-year-old breezed past them and into contention.
