|Full name||Isidro Díaz Bernabé|
|Date of birth||15 May 1972|
|Place of birth||Valencia, Spain|
|Height||1.69 m (5 ft 6 1⁄2 in)|
|* Senior club appearances and goals counted for the domestic league only|
Born in Valencia, Díaz spent his first years as a senior in Tercera División, with the exception of the 1992–93 season, which ended in relegation from Segunda División B with Real Zaragoza's reserves. In the summer of 1995, he was part of a group of players dubbed "The Three Amigos" – which also included countrymen Jesús Seba and Roberto Martínez – who were brought to Wigan Athletic by club chairman Dave Whelan; he helped the team to the Third Division title two years later, with the player contributing with six goals in 35 matches.
Unable to agree a new deal with Wigan, Díaz left the club by mutual consent in July 1997 and signed for Wolverhampton Wanderers. He played one game for the latter, a 0–3 defeat against Oxford United, before returning to the DW Stadium later that year; his second spell with Wigan was not as successful, appearing just three times in the league before moving to Rochdale at the end of the season; midway through 1998–99, he returned to his home country to play for FC Cartagena.
Díaz spent the following seven years in Portugal and its Segunda Liga, appearing and scoring regularly for both Leça FC (one season) and G.D. Chaves (six, where former Zaragoza and Wigan teammate Seba had already played). Aged 34, he returned to Spain and spent two years with Barakaldo CF in the third level.
- "Wigan finally land boss Martinez". BBC Sport. 15 June 2009. Retrieved 1 February 2017.
- "Football". The Independent. 17 July 1997. Retrieved 29 June 2011.
- "Oxford United 3 Wolves 0". Sporting Life. 1997. Retrieved 30 June 2011.
- Paralta Gomes, Lídia (10 July 2018). "Roberto Martínez, o discípulo de Confúcio: a história do espanhol forjado em Inglaterra que pode levar a Bélgica ao título mundial" [Roberto Martínez, Confucius' disciple: the story of the Spaniard forged in England who may lead Belgium to the world title]. Expresso (in Portuguese). Retrieved 19 October 2018.