In 26 innings pitched for the Braves for the season, he was 1–1 with a 3.81 ERA. At the end of the 2017 season, Fried joined the Peoria Javelinas of the Arizona Fall League, for whom he was named league Player of the Week on October 31. He led the league with 32 strikeouts in 26 innings (3rd in the league), and was 3–1 with a 1.73 ERA (6th in the league) in six starts. He ranked first among starters with a .163 opponents’ average, was second in fewest-baserunners-allowed-per-nine-innings (7.96), and was named to the AFL’s Top Prospects Team. "Baseball America" rated him # 3 on the AFL Hot Sheet. In December, Braves manager Brian Snitker said that he might look at Fried, Lucas Sims, or another pitcher as the team's fifth starter in 2018. Fried began the 2018 season with the Mississippi Braves. After one game, he joined the Gwinnett Stripers. He was called up to Atlanta in April. In 33.2 innings pitched for the Braves in the 2018 regular season, he was 1–4 with 44 strikeouts and a 2.94 ERA. With runners in scoring position he kept batters to one hit in 30 at bats (.033); with RISP and two outs, opposing batters were 0-for-14 with eight strikeouts. Fried was placed in the bullpen at the start of the 2019 season, and later moved to the starting rotation. In a game against the Los Angeles Dodgers on May 7, Fried was hit on the left hand by a batted ball from Alex Verdugo. Fried avoided major injury, left the game, and made his next regularly scheduled start. In 2019 Fried was 17–6 with a 4.02 ERA, as in 33 games (30 starts) he pitched 165.2 innings in which he struck out 173 batters. His 17 wins were 2nd in the National League, and his .739 won-loss percentage was 5th in the league. He induced the second-lowest percentage of fly balls (22.2%), and the third-highest percentage of ground balls (53.6%), of all NL pitchers, and threw his curveball 24.6% of the time (6th in the league). On defense, he led all NL pitchers in assists with 34, and had the 2nd-best range factor/9 innings pitched of 2.23.