1930 Bobby Jones Cap

When Bobby Jones won The Open Championship, the U.S. Open, the U.S. Amateur, and the Amateur Championship in 1930, the press struggled with what to call this achievement that no one thought possible. O.B. Keeler used a bridge term, “The Grand Slam.” According to George Trevor of the New York Sun, Jones “stormed the impregnable quadrilateral of golf.” Keeler later wrote, “This victory, the fourth major title in the same season and in the space of four months, had now and for all time entrenched Bobby Jones safely within the ‘Impregnable Quadrilateral of Golf,’ that granite fortress that he alone could take by escalade, and that others may attack in vain, forever.”

Commemorating Bobby Jones Impregnable Quadrilateral this 100% cotton cap has a genuine 1930 Buffalo Nickel, soft fabric strap, "Impregnable Quadrilateral" and Bobby Jones signature and four leaf clover (which represents Bobby Jones birth date on St. Patrick's Day in 1902) in customized embroidery on the side and back of the cap.