| Doyle Vaca | |
| Fullname: | Juan Doyle Vaca Mendoza |
| Birth Date: | 8 October 1979 |
| Birth Place: | Santa Cruz de la Sierra, Bolivia |
| Years1: | 1998 |
| Years2: | 1999 |
| Years3: | 2000–2002 |
| Years4: | 2003 |
| Years5: | 2004–2005 |
| Years6: | 2006 |
| Years7: | 2007 |
| Years8: | 2008–2009 |
| Years9: | 2009–2010 |
| Years10: | 2011–2012 |
| Caps1: | 29 |
| Caps2: | ? |
| Caps3: | 96 |
| Caps4: | 30 |
| Caps5: | 73 |
| Caps6: | 35 |
| Caps7: | 23 |
| Caps8: | 28 |
| Goals1: | 2 |
| Goals2: | ? |
| Goals3: | 6 |
| Goals4: | 2 |
| Goals5: | 6 |
| Goals6: | 5 |
| Goals7: | 2 |
| Goals8: | 1 |
| Nationalyears1: | 2001–2005 |
| Nationalcaps1: | 4 |
| Nationalgoals1: | 1 |
Juan Doyle Vaca Mendoza (born 8 October 1979 in Santa Cruz de la Sierra) is a Bolivian retired football defender.
Vaca made his debut for the Bolivia national team on October 7, 2001, in a World Cup qualifying match against Ecuador, as a 32nd-minute substitute for Sergio Rogelio Castillo. Since then he has scored once for the national squad.
Scores and results list Bolivia's goal tally first.[1]