Jan-Paul Saeijs is a Dutch central defender who was born in The Hague on 20th June 1978. Saeijs began his career in Holland with ADO Den Haag, and made his debut for the club in 1998. The powerful defender was a regular for the side for eight years until moving to Roda JC in January 2006, after 161 appearances for Den Haag. As well as being an excellent defender, Saeijs provided plenty of attacking threat. His giant frame caused problems for opposition players at corners, and he also took a mean free kick.
On 8th January 2009 Saeijs moved to Southampton. He made his Saints debut two days later in a match at Barnsley. Saeijs had a shaky start in the early stages of the Oakwell match, but gradually improved as the match went on, helping Southampton to a 1-0 win. The centre back was one of the club's better performers in the second half of the 2008/09 season. On 7th April Saeijs scored a brace in a 2-2 draw at Watford. His second at Vicarage Road that night was one of the goals of the season, an unstoppable 30 yard free kick. Saeijs left Saints after their relegation to League 1 to return to Roda in May, having lined up 20 times for the South Coast club. The Dutchman was keen to return to St Marys and issued a come and get me plea to the club in the summer of 2009. No deal ever came to fruition however, and Saeijs spent the 2009/10 campaign at Roda.
On June 10th 2010 Saeijs signed a two year deal with newly promoted Eredivise outfit De Graafschap. He made his debut as a substitute in a 6-0 defeat to PSV on 14th August 2010.