|Full name||Guillaume Warmuz|
|Date of birth||22 May 1970|
|Place of birth||Saint-Vallier, France|
|Height||1.87 m (6 ft 1 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only.
Born in Saint-Vallier, Saône-et-Loire, Warmuz started his professional with Olympique de Marseille in 1989. After no Ligue 1 appearances in his sole season he moved to CS Louhans-Cuiseaux from Ligue 2, where he was first-choice.
In the 1992 summer Warmuz signed for RC Lens back in the top flight, making his debut in the competition on 8 August in a 3-0 home defeat by AJ Auxerre. Over the course of the following ten years he went on to play in 427 official games for Les Sang et Or, winning the 1998 national championship and the following year's Coupe de la Ligue.
In January 2003, then a free agent Warmuz signed a short-term contract for Arsenal, as a replacement for the injured Rami Shaaban. He left in July after failing to appear in any matches, and joined Borussia Dortmund after Jens Lehmann had just left for the Gunners.
Warmuz featured in 17 Bundesliga matches in his first season, as the other goalkeeper Roman Weidenfeller did the same and the club finished in sixth position. He left in 2005 to AS Monaco FC back in his country, retiring at the end of the 2006–07 campaign at the age of 37.
- "Warmuz claque la porte des Sang et Or" [Warmuz shuts door on the Sang et Or] (in French). Libération. 28 December 2002. Retrieved 6 March 2014.
- "Arsenal solve keeper crisis". BBC Sport. 31 January 2003. Retrieved 16 August 2012.
- "Spätzünder! Nimmersatt! DFB-Keeper?" [Late bloomer! Insatiable! German national team keeper?] (in German). Sport1. 20 August 2013. Retrieved 6 March 2014.
- "Gueugnon: Warmuz manager sportif" [Gueugnon: Warmuz sporting manager] (in French). Foot 365. 19 February 2008. Retrieved 6 March 2014.