 He was one for two with a run and RBI as Michael Duursma's backup at 2B in the 2006 Intercontinental Cup.In 2007, Koolen hit .386/.525/.534 with 22 walks and 21 runs in 26 games.He lost the batting title by six points to Danny Rombley, was second to Fausto Alvarez in slugging and led the league in OBP.