He only appeared in five matches in his first season in Navarre but was instrumental in helping the team to avoid relegation in the last round at the expense of Valencia CF, following a 1–1 home draw against Atlético Madrid.
Alongside namesake Martín Domínguez, he helped to a fourth-place finish in 1990–91 – playing all but one of the games – with the subsequent qualification for the UEFA Cup.
[3] After a final season with Osasuna, filled with injuries and spent in the Segunda División, Martín González returned to the capital in summer 1995 with lowly Rayo Vallecano,[4] for a further two top-flight years, being relegated in his second.
Immediately after retiring, Martín González returned to Osasuna as an assistant coach and director of football (accumulating in some seasons).
He was briefly fired in October 2003[5] but later returned, now in only the latter capacity; he occupied that position for several years,[6][7] leaving the El Sadar Stadium in August 2013.