| David Mainz | |
| Fullname: | David Emilio Mainz Navarro |
| Birth Date: | 21 June 1985 |
| Birth Place: | Sádaba, Spain |
| Position: | Forward |
| Currentclub: | Borja |
| Youthclubs1: | Ejea |
| Years1: | 2004–2005 |
| Years2: | 2005–2006 |
| Years3: | 2006–2008 |
| Years4: | 2008–2009 |
| Years5: | 2009–2010 |
| Years6: | 2010–2011 |
| Years7: | 2011–2013 |
| Years8: | 2013–2014 |
| Years9: | 2014 |
| Years10: | 2014 |
| Years11: | 2015–2016 |
| Years12: | 2016–2017 |
| Years13: | 2017–2019 |
| Years14: | 2019– |
| Clubs1: | Ejea |
| Clubs2: | Santa Anastasia |
| Clubs3: | Zuera |
| Clubs4: | Universidad Zaragoza |
| Clubs5: | Ejea |
| Clubs6: | La Muela |
| Clubs7: | Eibar |
| Clubs8: | Jorge Wilstermann |
| Clubs9: | Eibar |
| Clubs10: | AEL |
| Clubs11: | Huesca |
| Clubs12: | Hércules |
| Clubs13: | Ebro |
| Clubs14: | Ejea |
| Clubs15: | Borja |
| Caps5: | 33 |
| Caps6: | 35 |
| Caps7: | 70 |
| Caps8: | 18 |
| Caps9: | 13 |
| Caps10: | 0 |
| Caps11: | 36 |
| Caps12: | 53 |
| Caps13: | 57 |
| Caps14: | 40 |
| Caps15: | 22 |
| Goals5: | 12 |
| Goals6: | 9 |
| Goals7: | 22 |
| Goals8: | 4 |
| Goals9: | 2 |
| Goals10: | 0 |
| Goals11: | 13 |
| Goals12: | 11 |
| Goals13: | 5 |
| Goals14: | 8 |
| Goals15: | 6 |
| Club-Update: | 4 May 2019 |
David Emilio Mainz Navarro (born 21 June 1985) is a Spanish footballer who plays for Borja as a forward.
Born in Sádaba, Province of Zaragoza, Mainz made his senior debuts with SD Ejea in the 2004–05 season, in Tercera División. He first arrived in Segunda División B in 2010, signing with CD La Muela also in his native Aragon.
On 9 July 2011, Mainz joined fellow league team SD Eibar.[1] In his second year he scored 11 goals in the regular season (plus two in the play-offs), helping the Basque side to return to Segunda División after a four-year absence.
On 29 May 2013, Mainz announced he was moving to Club Jorge Wilstermann from Bolivia,[2] being presented on 9 July.[3] On 23 January of the following year, however, he returned to both his country and Eibar.[4]
Mainz appeared in his first game as a professional on 1 February 2014, starting in a 1–0 home win against UD Las Palmas.[5] He appeared in 13 matches during the campaign, as the Armeros were promoted to La Liga for the first time ever.
On 11 July 2014, Mainz terminated his contract with Eibar[6] and moved to Greek Football League side Athlitiki Enosi Larissa F.C. six days later.[7] On 14 December, however, he returned to his home country and signed for SD Huesca in the third level.[8]