Herrero returned to Jaén for the second time in the 2003 off-season, retiring at the end of the 2005–06 campaign after a further three years in the third level, aged 36. He totalled 272 matches for his main club in seven years, 253 in the league, 16 in the Copa del Rey and three in the Copa Federación de España, scoring 40 goals in all competitions.[7]
Coaching career
After retiring, Herrero was an assistant manager of Real Jaén B, being promoted to head coach in the summer of 2009 as they competed in the regional championships. He left at the end of the season, and joined the first team.
In February 2011, after working with the club as a match delegate, Herrero obtained a professional license, being named Jaén's manager after replacing fired José Miguel Campos.[8] In 2012–13, he led the side to the first place in the regular season and the subsequent playoff promotion, which meant a return to Segunda División after an 11-year absence.[9]
On 4 July 2013, Herrero signed a new contract with the Whites.[10] He left the club the following year, after his side's relegation.[11]
Herrero signed with Hércules CF in the third tier on 26 January 2015, taking over from the sacked Pacheta.[12] He was dismissed roughly one year later, following a 0–2 home loss against CD Alcoyano.[13]
On 14 June 2016, Herrero was appointed SD Ponferradina manager,[14] lasting only four months in charge. The following 20 May, he signed with UD Melilla.[15]
Herrero took over Real Murcia on 11 June 2018.[16] Having won eight of 26 games, he was relieved of his duties the following 27 February.[17]
On 6 November 2019, Herrero returned to Melilla, 13th in their third-division group.[18]
^Alvarado, Arturo (25 September 1994). "La fiesta no va con el Zaragoza" [Zaragoza do not want to have anything to do with partying] (in Spanish). Mundo Deportivo. Retrieved 2 February 2021.
^Alvarado, Arturo (10 October 1994). "El Valladolid pone freno al Valencia" [Valladolid stop Valencia in their tracks] (in Spanish). Mundo Deportivo. Retrieved 2 February 2021.
^Ríos, Xoan (28 November 1994). "El Dépor se venga de González" [Dépor take revenge on González] (in Spanish). Mundo Deportivo. Retrieved 2 February 2021.