Mesa Solar Sox
In 2014, Berti played for the New Hampshire Fisher Cats of the Double-A Eastern League. He stole 38 bases, was named an Eastern League All Star, and was assigned to the Arizona Fall League after the regular season. He also set career-highs in games played (136), home runs (7), and RBI (50). In the offseason, Berti played 20 games with the Mesa Solar Sox of the Arizona Fall League, and batted .292 with 3 home runs, 8 RBI, and 6 stolen bases. He would split time in 2015 with New Hampshire and the Triple-A Buffalo Bisons. In 103 total games, he hit .249 with 3 home runs, 34 RBI, and 23 stolen bases.