After three years with Golden State, Jones joined the Hawks for the 2019-20 season. He entered the All-Star break having appeared in 51 games and logging 27 starts. Jones was a regular off the bench to begin the year, but he entered the starting lineup for a Nov. 12 win over Denver and went on to start every game through Dec. 19. The big man returned to the starting lineup in late-January, making seven consecutive starts between Jan. 30 and Feb. 10. In that span, he averaged 6.6 points, 5.6 rebounds, 1.0 assists and 1.3 steals in 21.3 minutes per game. At the All-Star break, Jones held averages of 5.9 points, 3.8 rebounds, 0.6 assists, 0.5 steals and 0.7 blocks in 16.7 minutes per game. After the break, he appeared in four games before the NBA suspended play on Mar. 11. On the season, Jones scored in double-figures 11 times, including a season-high 20 points against the Nets on Dec. 4. Against the Timberwolves on Feb. 5, Jones posted 14 points, eight rebounds, two assists, two steals and one block in 24 minutes. He had a season-high four blocks, to go with 11 points and three boards, against the Clippers on Nov. 16.

The last pick of the first round in the 2016 NBA Draft, Jones started at center for the defending-champion Warriors to open the 2018-19 season. He responded with 12 points, three rebounds, two assists and three blocks in 27 minutes of a 108-100 victory over the Oklahoma City Thunder. The athletic seven-footer ended up starting 22 of the 24 games he appeared in for the Warriors. Jones set career highs across the board. The former Vanderbilt Commodore averaged 5.4 points, 3.1 rebounds and 1.2 assists in 17 minutes per contest. He collected career highs in rebounds (seven) and blocked shots (four) in a loss at Dallas on Nov. 17. Jones shot a blistering 71.6 percent from the floor on the year, with all of his shots coming from two-point range. Unfortunately, Jones tore his left pectoral muscle, underwent surgery and subsequently missed the remainder of the regular season. He returned for the playoffs but played a minimal role, including a two-minute appearance in Game 4 of the NBA Finals. Jones was traded to the Atlanta Hawks following the season in exchange for another former first-round pick, Omari Spellman.

A first-round pick in the 2016 NBA Draft, Jones spent most of the 2017-18 season with the G League's Santa Cruz Warriors, where he posted promising stats across 45 games. The big man scored 15.0 points per game on an incredible 67.8 percent field-goal percentage. He also averaged 8.0 rebounds and 2.0 assists per game. Jones' length and athleticism allowed him to shine defensively, averaging 2.2 blocks. He also made 15 appearances with the big club, averaging 5.9 minutes per contest. Jones' first five NBA games were scattered throughout the year, though he stuck with Golden State for the final 10 games of the regular season. In those contests, he upped his average court time to 7.8 minutes and played more than 10 minutes on three occasions. Jones was effective in his limited opportunities, averaging 10.1 points, 5.7 rebounds and 1.2 blocks per 36 minutes. He also remained efficient, shooting precisely 50 percent from the field for the second straight year. Jones scored a season-high eight points on a perfect 4-of-4 from the field against Oklahoma City on Apr. 3.

Jones was taken by Golden State with the last pick of the first round (30th overall) in the 2016 NBA Draft. The 6-foot-11 center appeared in 10 games for the star-studded Warriors, averaging nine minutes per contest. A torn right pectoral muscle suffered prior to the draft kept Jones from full-contact drills until late November. The Vanderbilt product made his NBA debut on Dec. 10, playing nine minutes. Jones scored his first NBA baskets Feb. 1, when he contributed four points, two rebounds and one block over four minutes during a win over the Hornets. However, he mostly worked on refining his play over 31 games with the G League's Santa Cruz Warriors. The rookie averaged 11.3 points, 7.2 rebounds and 2.1 blocks with in the G League. On Mar. 31, he produced 25 points, seven rebounds and five blocks for Santa Cruz during a win over the LA D-Fenders. Jones also got his first taste of NBA postseason action, making appearances in four of Golden State's 17 playoff games during the course of the team's championship run. He made three of his seven shots while collecting six rebounds, two steals and a block across nearly 21 minutes of total playoff action.