Bolivians knew him first as Chichi and then simply as El Maestro, a midfielder who scored 134 goals in 348 domestic league matches after turning professional with Destroyers at fifteen in 1973. CONMEBOL named him Bolivia's greatest footballer of all time in 2014, and he won the Bolivian championship twice with Bolívar, in 1982 and 1983, alongside 49 appearances for Bolivia between 1977 and 1989. Career record: 49 caps and 5 goals for Bolivia; club career at Oriente Petrolero, Club Bolívar, Real Santa Cruz.
| 1973–1976 | Club Destroyers |
| 1977–1979 | Oriente Petrolero |
| 1980–1980 | Quilmes Atlético Club |
| 1981–1984 | Club Bolívar |
| 1985–1986 | Real Santa Cruz |
| 1986–1986 | Atlético Bucaramanga |
| 1987–1988 | Oriente Petrolero |
| 1989–1990 | Club Blooming |
| 1992–1992 | C.D. Jorge Wilstermann |
| Bolivia | 49 caps, 5 goals |
Bolivia legends whose careers overlapped Romero's
One rank above: Marcelo Moreno Martins at #5.
One rank below: Jaime Moreno at #7.
Bolivia's editorial top five: Marco Etcheverry · Erwin Sánchez · Julio César Baldivieso · Víctor Agustín Ugarte · Marcelo Moreno Martins.