Galvis returned to Reading for his 2010 season after earning an invitation to the Phillies' major league spring training. He led all shortstops in the Eastern League in fielding percentage, assists, putouts, and total chances. He was named an Eastern League all-star. After the season, he played for Navegantes del Magallanes in the Venezuelan Winter League. Entering 2011, he was "considered major-league-ready defensively but a major liability offensively." But in 2011, at age 21, Galvis had the best season of his career to date. Always known as an excellent defender, but mediocre hitter, he was finally able to improve at the plate, thanks in part to a much more rigorous off-season conditioning regimen, and also due to hitting higher in the batting order, where he was thus challenged to make greater offensive contributions by utilizing a more aggressive approach. He also improved his arm strength to the point that at least defensively, coaches and front office personnel felt he was ready to be a major league shortstop. Starting the year in Double-A (AA) with the Reading Phillies, Galvis hit .273, with 35 RBIs, in 464 plate appearances across 104 games. In August, Galvis was promoted to the Triple-A (AAA) Lehigh Valley IronPigs, with whom he hit .321 with nine multi-hit games and 13 runs scored in his first 23 games. He hit in the leadoff spot with Lehigh Valley as well. Overall with Lehigh Valley, he hit .298, with eight RBIs in 126 plate appearances during 33 games. Between AA and AAA, he combined to hit .278 with eight home runs, 43 RBIs, 78 runs, and 23 stolen bases in 137 games. His excellent numbers were enough to earn the 2011 Paul Owens Award, which is given to the best position player and pitcher, respectively, in the Philadelphia Phillies minor league system. At the end of the 2011 season, Galvis was sent to the Venezuelan Winter League, and despite a brief ganglion cyst injury, played there until December 1.
