Club Atlético Vélez Sarsfield
Ovejero began his career with Club Atlético Vélez Sarsfield, where he would win the 1968 Argentine first division. He played for Atlético Madrid between 1969 and 1974, winning the Spanish La Liga in 1970 and 1973, and the Copa del Rey in 1972. He also played for the Argentina national football team in the 1967 South American Championship.