| Mario Ruíz | |
| Fullname: | Mario Alejandro Ruíz Díaz |
| Birth Date: | 12 January 1977 |
| Birth Place: | Morelia, Mexico |
| Position: | Defender |
| Years1: | 1999–2003 |
| Years2: | 2003–2010 |
| Years3: | 2010–2011 |
| Clubs3: | Club León |
| Caps1: | 144 |
| Caps2: | 148 |
| Caps3: | 35 |
| Goals1: | 2 |
| Goals2: | 2 |
| Goals3: | 0 |
| Nationalyears1: | 2003–2005 |
| Nationalteam1: | Mexico |
| Nationalcaps1: | 9 |
| Nationalgoals1: | 0 |
| Club-Update: | November 04, 2008 |
Mario Alejandro Ruíz Díaz (born 12 January 1977) is a former Mexican footballer and defender. He last played for Club León. He started his career in 1997 with Morelia, where he became a symbol. In 2003, he was transferred to Tigres.