His two older brothers were also athletes, Jeff played hockey for the University of Idaho and Pete was a professional golfer between 2006 and 2008.

He led the Washington Huskies men's golf team in scoring between 2010 and 2013, and won six tournament and recorded 20 top-10 finishes.

[3] Williams made his major debut at the 2011 U.S. Open at Congressional Country Club after he secured a spot with a win at the sectional qualifying event at Gold Mountain, Washington.

He won the 2012 Eisenhower Trophy, the World Amateur Team Championship, together with Steven Fox and Justin Thomas, recording the second best individual score, one stroke behind Sebastián Vázquez.

[5][6] Williams received the Ben Hogan Award as a senior, an honor the NCAA bestows annually to the best college golfer.