[citation needed] He then hit .250/.280/.333 as the Dutch first baseman in the 2000 Summer Olympics in Sydney in which the Netherlands finished fifth.

[citation needed] In 2001, Isenia helped the Netherlands win the European Championship, batting fifth and playing first base in the gold medal game.

[citation needed] In the 2002 Intercontinental Cup, Isenia produced at a .182/.308/.455 clip; he hit one of only two homers for the Netherlands, with Hensley Meulens providing the other.

In the 2003 World Port Tournament, Percy hit .243/~.282/.378 with 7 RBI to tie Fausto Álvarez for third in the event.

[citation needed] In the 2006 World Baseball Classic, Isenia struck out against J.C. Romero as a pinch-hitter for Adriana in the 8th inning of game one.

[citation needed] Overall, his .400/.500/.400 line produced a better OPS than the team's other 1B/DH options, major leaguer Randall Simon and AAA veteran Adriana.

[citation needed] Isenia hit .273/.385/.273 in the 2006 Haarlem Baseball Week and scored the tying run in the finale against Cuba.

He hit .226/.294/.516 with 7 runs and 8 RBI in 8 games in the 2006 Intercontinental Cup to help the Dutch to a silver medal.

[citation needed] Isenia was selected by coach Robert Eenhoorn in the team that represents the Netherlands at the 2008 Summer Olympics in Beijing.