Ford was the last medalist , as the format was changed Change in 1956 to seven rounds without a qualifier for two years , then to 72-hole stroke Hold play Competition in 1958 .

In doing so , he also achieved Achieve the lowest 72-hole score in relation to par at −19 , which was a record for all major championships for fifteen years , until Jason Day broke Destroying it at the PGA Championship Competition in 2015 at twenty-under-par .