Miguel Ernesto Herrera Aguirre (born 18 March 1968), popularly referred to by his nickname "Piojo" (Spanish for "louse"),[3] is a Mexican professional football manager and former player.

A former defender, Herrera began his career playing with second division side Deportivo Neza in 1985, then transferring to Tecos UAG in 1987, and making his debut in the Primera División in 1988.

After a brief period with Santos Laguna, in 1989 Herrera transferred to Atlante and went on to play for the club on three occasions, winning his only league championship as a player during the 1992–93 season.

Herrera was also a Mexican international, earning 14 caps and participated in the 1993 Copa América tournament in which Mexico finished runner-up.

In October 2013, Herrera was named interim coach of the Mexico national team to guide them through the intercontinental playoff matches against New Zealand to qualify for the 2014 World Cup.

After Mexico won the playoff and gained qualification, Herrera's job was extended to coaching the team during the World Cup.

Despite leading Mexico to the 2015 CONCACAF Gold Cup, he was sacked as coach of the national team after a physical altercation with a journalist.

He again transferred to Atlante in 1991, and won his first league title during the 1992–93 season after defeating Monterrey in the finals by a 4–0 aggregate score after winning the first-leg 1–0 and the second 4–0.

Herrera was then sold to Toros Neza, with whom he would play in his second league final during the "Verano '97" season, ultimately losing to Guadalajara by an aggregate score of 7–2.

Herrera played in all of Mexico's matches during the qualifying stages for the 1994 FIFA World Cup, though he was omitted from the final squad list by coach Miguel Mejía Barón.

[9] Shortly after leaving Veracruz, Herrera was hired to manage a struggling Estudiantes Tecos midway into the Apertura 2008 tournament to replace José Luis Trejo.

[15][16][17] In his first press conference, Herrera revealed he had signed a six-month contract, saying, "[i]f in six months I don't give results, I'll leave.

[25] At the World Cup, Mexico finished second in their group with 7 points, obtaining wins against Cameroon[26] and Croatia[27] and securing a scoreless draw against the host nation.

[37] The following week, Herrera won his first league match in his second spell with América, defeating Pachuca 2–0 at Estadio Hidalgo.

[40] The club finished the following Clausura tournament in second-place, and was again eliminated at the semifinal stage, this time losing to Santos Laguna by a 6–3 aggregate score.

[41] Herrera led América to another second-place finish in the 2018 Apertura, only suffering two defeats throughout the regular phase of the tournament, and went undefeated in the playoffs.

[42] On 16 December, Herrera won his second league title – both with Club América – following a 2–0 aggregate victory over Cruz Azul in the finals.

[43] He also led the team on a 17-game unbeaten streak en route to winning the championship, equaling the record set by the club under Mario Carrillo in 2005 when it won that year's Clausura.