average (ERA) in 10 games (eight starts). The next season, 2008, he advanced to the Williamsport Crosscutters, and went 6–5 with a 3.67 ERA in 14 starts. He led the New York–Penn League in innings pitched, pitching at least six in almost 65% of his starts; the Phillies named him their minor league player of the week in mid-June. Before the 2009 season, at the decision of Phillies minor league pitching coordinator Gorman Heimueller and assistant general manager Chuck LaMar, De Fratus became predominantly a relief pitcher so he was "not sitting down four games out of the week" and could be a more focused pitcher. He took his first crack at relief pitching with the Lakewood BlueClaws, and ultimately began to flourish, earning Phillies minor league player of the week honors, and a spot in the South Atlantic League all-star game. On the season, he posted a 5–6 record with a 3.19 ERA in 36 games (though still with 12 starts). After the season, he participated in the Florida Instructional League. He had a successful 2010 season, splitting time between the High-A Clearwater Threshers and Double-A Reading Phillies, and posting a 1.94 ERA with 21 saves in 49 games. De Fratus began the 2011 season with Double-A Reading, and was promoted to Triple-A Lehigh Valley on June 16 after much success in Reading. He recorded seven saves with Lehigh Valley, and was named the Phillies minor league player of the week in late August, before making his MLB debut with the Philadelphia Phillies on September 18, 2011, after joining the team as a September callup. During his debut, an opposing batter fouled a ball off, and De Fratus's brother caught the ball. Ultimately, it was a scoreless debut, and he went on to pitch four more big-league games that season. At the end of the season, Baseball America rated him the seventh-best prospect in the Phillies' minor league system. Before 2012, like in 2011, he was given an opportunity to open the season in the Phillies bullpen, but ended up injuring his shoulder, and missing much of the season. He called the injury a "beat down" both physically and mentally, but he returned and pitched with the big-league club in September. At the conclusion of the season, he was mentally exhausted and used golf to help "divert" his attention from baseball, playing over 50 rounds in the offseason; he