| Diego Zarzosa | |
| Birth Name: | Diego Zarzosa Peña |
| Birth Date: | 25 December 1975 |
| Birth Place: | Valladolid, Spain |
| Height: | 1.780NaN0 |
| Weight: | 105kg (231lb) |
| Ru Position: | Hooker |
| Ru Nationalteam: | Spain Barbarians |
| Ru Nationalyears: | 1998–2009 2007 |
| Ru Nationalcaps: | 46 1 |
| Ru Nationalpoints: | (15) (5) |
| Ru Ntupdate: | 7 February 2022 |
| Ru Clubyears: | 1996-2006 2006-2007 2007 2007-2009 2009 |
| Ru Proclubs: | CR El Salvador CRC Madrid Harlequins CR El Salvador Vacceos Cavaliers |
| Ru Clubupdate: | 2007-11-28 |
Diego Zarzosa Peña (born 25 December 1975 in Valladolid) is a Spanish rugby union hooker who plays for CR El Salvador in the División de Honor.
Zarzosa represented Spain during the 1999 Rugby World Cup.In 2007, Zarzosa signed a six-months contract with English giants Harlequins after Samoan Tani Fuga was called to the World Cup squad and Chris Brooker suffered a shoulder injury. He was not able to debut in the Premiership. Later that year, he became the second Spanish-born rugby player to play for the Barbarians.
Zarzosa holds currently 45 caps for Spain, with 3 tries scored, 15 points in aggregate.