
Monterrey signed him from Libertad in 2008 and he repaid them inside sixty seconds, scoring in the first minute of his first league match, a 4-0 win over Puebla. He won four Paraguayan championships with Libertad, five Liga MX titles across Monterrey, América and Santos Laguna, three CONCACAF Champions League crowns, and he was in the Paraguay side beaten by Uruguay in the 2011 Copa América final. Career record: 32 caps and 1 goals for Paraguay; club career at Club Libertad, Club de Fútbol Monterrey, Club América.
| 2003–2008 | Club Libertad |
| 2008–2011 | Club de Fútbol Monterrey |
| 2011–2012 | Atlante |
| 2013–2016 | Club América |
| 2017–2018 | Santos Laguna |
| 2019–2019 | Atlas |
| 2020–2020 | Puebla |
| 2021–2021 | Club Sol de América |
| 2021–2021 | Querétaro |
| 2022–2022 | Club General Caballero (Juan León Mallorquín) |
| 2023–2024 | Sportivo Luqueño |
| Paraguay | 32 caps, 1 goals |
Paraguay legends whose careers overlapped Martínez's
One rank above: Derlis González at #29.
One rank below: Aureliano Torres at #31.
Paraguay's editorial top five: Arsenio Erico · José Luis Chilavert · Carlos Gamarra · José Saturnino Cardozo · Julio César Romero.