Birthdate: 17 August 1980
Birthplace: Makkinga, Netherlands
Other clubs: Go Ahead Eagles (1998-2000), AZ Alkmaar (2000-05), Villareal (2005-06), PSV (2006-11), Go Ahead Eagles (2 / 2011-)
Bought from: Villareal
Signed for LFC: Swap with Josemi, 04.01.2006
International debut: 18.08.2004 vs. Sweden
International caps: 11/0 (3/0 at LFC) - 04.06.2006
Liverpool debut: 07.01.2006
Last appearance: 19.08.2006
Contract expiry: 31.08.2006
Win ratio: 72.22% W: 13 D: 2 L: 3
Total games/goals opposite LFC: 4 / 0
LFC league games/goals: 14 / 0
Total LFC games/goals: 18 / 0
Kromkamp started out as a midfielder with Go Ahead Eagles in the 1998/99 season in the Dutch second division. He was sold to first division AZ Alkmaar before the 2000/01 season where he was transformed into a right-back. His exploits in the UEFA Cup in the 2004/05 season when AZ reached the semi-finals caught the attention of Valencia, Porto, Arsenal and Villareal. After discussions with Porto fell through Villareal was quick to snap him up. However, he had trouble adjusting to Spain and after only 11 games and five months into his five-year-contract he went to Liverpool in a straight swap with Josemi. Kromkamp couldn't dislodge Steve Finnan from his position but he did finish his debut season in a blaze of glory as a sixty-seventh minute substitute for Xabi Alonso in the 2006 FA Cup final which went to penalties. Seven months after his arrival homesick Kromkamp returned to Netherlands at the last day of the transfer window without having made a real impression at Liverpool. He won the Eredivise two years in a row at PSV from 2007-2008. After missing 18 months due to injuries he rejoined his first club, second division Go Ahead Eagles, in February 2011.
Kromkamp made only fourteen first-team appearances for Go Ahead Eagles Deventer in 2012/13 having made double that number in 2011/12.