Williams-Goss announced the decision Tuesday on Instagram.
Two years ago I transferred to Gonzaga University with three main goals: earn my college degree, improve my game and help Gonzaga reach its first ever Final Four. I'm proud to say all three of my goals were met. In the classroom, I earned my degree in Psychology and have begun work on my Masters. On the court, my teammates and I made school history winning 37 games, advanced to the Final Four, and played in the National Championship game. Coming to Gonzaga is the best decision I ever made. What I was most surprised by this season was not the wins, awards, or recognition, but rather the genuine love I felt with our fans in Spokane. Since arriving, everywhere I went, I have been surrounded by love from the Gonzaga community. I cannot describe the incredible relationships I have formed in my time here and would not trade my experience for anything in the world. I could not be more grateful or humbled to call myself a Zag for life! After many discussions with my coaches and family, I have decided to enter the 2017 NBA Draft with representation. I am 100% confident in this decision and believe I am prepared both mentally and physically to take this step in my career and my life. As always, I give all glory to God for granting me this opportunity. I will continue to represent the entire Gonzaga community to the best of my ability. To all my teammates, coaches, fans, supporters, and believers...I love you and thank you! Forever and always... #GoZags
"After many discussions with my coaches and family, I have decided to enter the 2017 NBA Draft with representation," Williams-Goss wrote. "I am 100% confident in this decision and believe I am prepared both mentally and physically to take this step in my career and my life."
Williams-Goss spent one season playing for Gonzaga after transferring from Washington following his sophomore campaign. He put forth an All-America-caliber season, averaging 16.8 points, 6.0 rebounds and 4.7 assists and helping lead the Bulldogs to the national championship game, where they fell to North Carolina.
The 6-foot-3 point guard is projected by ESPN's Chad Ford in the second-round pick/undrafted range, ranking No. 218 in June's NBA draft.
Williams-Goss is Gonzaga's second player to enter the draft since the season ended, joining potential lottery pick Zach Collins. Seniors Jordan Mathews and Przemek Karnowski are also out of eligibility, meaning coach Mark Few will return just two of his top six from this year's national title runner-up.