Career
Club
Montero came through the youth ranks of Ramonense and debuted for the senior team in 1980. He moved to Alajuelense in 1987 and retired on 15 September 1998 after a game against Atlético Bucaramanga. During that match, Alajuelense retired his #20 jersey that he had used throughout his tenure with the club
Montero, however, did not exclusively use #20 during his Alajuelense tenure as he used #12 on occasion between 1990 and 1991, and #3 (belonging to fellow defender Hernán Fernando Sossa) at least once during the 1990-1991 season--Montero himself mentioned that he did this out of need due to the actual #20 shirts not being readily available.
He totalled 556 league games, 408 of them for Alajuelense. He answered "Voy a comprarme un chunche" ("I will buy a thing") meaning he would like to buy a vehicle (Costa Ricans use the word "chunche" to refer to pretty much anything).
He is one of the most charismatic soccer players in Costa Rica. He is the creator of El tiro del zoncho (The Vulture Shot), popular known play in which Montero headed to goal line, dribbled goalkeeper and shot powerfully above large pole of goal line approximately by 6 feet length from scoring line, the term derives of exaggeration popular told happening that the ball smashed a vulture, bringing it to ground.
International
The defender collected 56 caps, scoring 3 goals He also represented his country at the 1991 and 1995 UNCAF Nations Cups as well as at the 1991 CONCACAF Gold Cup.
He played his final international on June 5, 1996 against Canada. International goals
Scores and results list Costa Rica"s goal tally first. A few years after his retirement, Montero became assistant to manager Oscar Ramírez at Belén, then coach with Municipal Grecia in the second division.
After two seasons there, he became assistant head coach in his beloved team, Alajuelense and gained the CONCACAF Champions" Cup in 2004 and the national tournament in 2005.
He was the coach of Carmelita from 2007 to October 2008. He returned to Alajuelense to become the first coach assistant, again under Oscar Ramírez" management.
He was dismissed in August 2013 and put in charge of the club"s U-15 team
