Susdorf was assigned to Short Season Williamsport, but also played 2 games for Single-A Lakewood.

[1] Susdorf began the 2012 season with Reading, but was promoted to the Triple-A Lehigh Valley IronPigs in mid-May.

Susdorf began the 2013 season with Lehigh Valley, but after 70 games, he was promoted to Philadelphia.

On July 25, 2013, Susdorf was called up by the Phillies to replace Domonic Brown, who was placed on the 7-day disabled list with a concussion.

[2] He made his major league debut that day as a pinch-hitter, grounding into a double play.