Career
He started his 18-year professional career with PSV, then spent its remainder in France, mainly at the service of Cannes. Born in Eindhoven, Koot joined PSV Eindhoven in 1983 at the age of 20. During his eight years with the PSV, Koot appeared in more than 150 official games.
In the 1991 summer Koot joined AS Cannes in France, being relegated from Ligue 1 in his first year but gaining immediate promotion back.
In the 1997-1998 campaign, he acted as player-coach (21 matches, one goal) as the French Riviera team was again relegated. He played in 220 competitive matches during his tenure.
35-year-old Koot signed for another side in Ligue 2, Lille OSC, for 1998-1999, only missing on promotion due to goal difference. He retired at the end of the season, and became a sports agent.
Koot gained three caps for Holland, in one year.
His debut was on 23 March 1988, as he played seven minutes in a 2–2 friendly draw in England.