Fuld played for the Mesa Solar Sox in the Arizona Fall League in the Fall of 2007. On October 30, he was named AFL Player of the Week, after hitting .526. In 29 games with the Solar Sox, Fuld led the league in batting average (.402), hits (43), doubles (11), extra-base hits (16), total bases (67), obp (.492), slugging percentage (.626), and OPS (1.118), and was 3rd in the league in runs (20) and walks (17), 4th in stolen bases (10), and 5th in triples (2). He batted .462 with runners in scoring position, and .500 against lefties. Fuld was named the 2007 Most Valuable Player of the Arizona Fall League, after being the season's dominant player. He also was named to the AFL Top Prospects Team.