|Date of birth||16 August 1963|
|Place of birth||Eindhoven, Netherlands|
|Height||1.85 m (6 ft 1 in)|
|Playing position||Centre back|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
Born in Eindhoven, Koot joined PSV Eindhoven in 1983 at the age of 20. After only one Eredivisie game in his first two seasons combined, he proceeded to be regularly used as the club won five national championships and three domestic cups.
In the 1991 summer Koot joined AS Cannes in France, being relegated from Ligue 1 in his first season, but gaining immediate promotion back. In the 1997–98 season, he acted as player-coach (21 matches, one goal) as the French Riviera outfit was again relegated; he appeared in 220 official games over the course of eight seasons.
- European Cup: 1987–88
- Eredivisie: 1985–86, 1986–87, 1987–88, 1988–89, 1990–91
- KNVB Cup: 1987–88, 1988–89, 1989–90
- PSV eert ‘gouden’ selectie van 1988 (PSV's ‘golden’ XI from 1988); PSV's official website, 14 April 2011 (Dutch)
- Adick Koot, la caution défensive néerlandaise (Adick Koot, the Dutch defensive bail); Nord Éclair, 17 February 2011 (French)