To continue the recent upswing of MLSers training at random German clubs, Zach Pfeffer will train at Hoffenheim, who already have Americans Joe Gyau, Charles Renken, and Russell Canouse on their youth teams. http://twitter.com/#!/yscsports/status/137572613479350272
Believe he trialed there and was offered before Philly gave him a contract. Edit: think I even recall that after he signed with Philly he said he would continue to go train there in the offseason
Makes sense. Might as well get paid to play locally, keep the relationship with Hoffenheim going, and then jump over there when he's more ready. Even if he's on a 4 year deal (I have no idea what his contract is) he could jump over there while still in his teens.