Thomas De Wolf of the DSL Mets becomes the first minor leaguer born and raised in Belgium. He goes 1 for 4 with a walk, run and RBI and will post a .432 OBP in the 2009 Dominican Summer League, leading his club.

On May 30, 2009 — Thomas De Wolf of the DSL Mets becomes the first minor leaguer born and raised in Belgium. He goes 1 for 4 with a walk, run and RBI and will post a .432 OBP in the 2009 Dominican Summer League, leading his club.

Source:
Baseball Reference May 30