The U.S. Open returned in 1977 and 2001 and the PGA Championship has been played at the course four times : 1970 , 1982 , 1994 , and 2007 .
It was the first of seven major championships at Southern Hills .
The first   returned in 1977 and 2001 and the PGA Championship has been played at the course four times : 1970 , 1982 , 1994 , and 2007 .
It was the first of seven major championships at Southern Hills .