On January 7, 2015, Williams signed a 10-day contract with the Utah Jazz. On January 17, he signed a second 10-day contract with the Jazz, but after the contract expired, the Jazz decided to not retain him. Return to Santa Cruz (2015) Williams subsequently returned to Santa Cruz on January 27. On February 4, 2015, he was named to the Futures All-Star team for the 2015 NBA D-League All-Star Game. That same day, he signed a 10-day contract with the Charlotte Hornets. On February 10, he was waived by the Hornets before appearing in a game for them, and again returned to Santa Cruz. New Orleans Pelicans (2015) On March 4, Williams signed a 10-day contract with the New Orleans Pelicans. On March 14, he signed a second 10-day contract with the Pelicans. Third stint with Santa Cruz (2015–2016) Williams was not retained by the Pelicans following the expiration of his second 10-day contract on March 24, and subsequently returned to Santa Cruz two days later. On April 26, the Warriors claimed their first D-League championship as they defeated the Fort Wayne Mad Ants 2 games to 0. Along with his first D-League championship, Williams received the Finals MVP award. On July 28, 2015, Williams signed with the Charlotte Hornets, returning to the team for a second stint. However, he was waived on October 23, after appearing in two preseason games. On November 12, he was reacquired by the Santa Cruz Warriors. Memphis Grizzlies (2016) On January 8, 2016, Williams signed a 10-day contract with the Memphis Grizzlies. He made his Grizzlies' debut that night in a 91–84 win over the Denver Nuggets, recording two points in nine minutes of action. After the contract expired, the Grizzlies decided to not retain him. Fourth stint with Santa Cruz (2016) On January 22, 2016, Williams returned to Santa Cruz. On January 29, he was named in the West All-Star team for the 2016 NBA D-League All-Star Game, earning his second straight All-Star nod. Panathinaikos (2016) On February 9, 2016, Williams left Santa Cruz and signed with Greek club Panathinaikos. In 10 EuroLeague games, he averaged 13.1 points, 2.8 rebounds, 1.0 assists, and 0.6 steals, in 26.3 minutes per game. In 17 Greek Basket League games, he averaged 11.5 points, 2.1 rebounds, 1.8 assists, and 0.8 steals, in 21.4 minutes per game. Golden State Warriors (2016) On September 16, 2016, Williams signed with