College golfer delivers US Amateur upset with added pressure of having just one extra golf ball

Competing in the US Amateur, the most prestigious amateur golf tournament in the world, is already stressful enough. Showing up to the first tee to take on one of the top seeds in the field with just two golf balls to your name, well, that presents a whole new level of stress, and one that Ryder Cowan experienced at Merion Golf Club on Wednesday.

Cowan, a senior at Oklahoma, made his way through a 16-man playoff for 11 spots to earn the No. 59 seed in the 64-man match play bracket and drew...