|Full name||César Láinez Sanjuán|
|Date of birth||10 April 1977|
|Place of birth||Zaragoza, Spain|
|Height||1.82 m (6 ft 0 in)|
|1999||→ Villarreal (loan)||3||(0)|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
A Real Zaragoza youth graduate, Láinez made his professional debuts with its B-side, but struggled initially to find a first-team place. In January 1999 he served a six-month loan stint at Villarreal CF, playing in three La Liga matches in a season which ended in relegation.
After his return to Zaragoza, Láinez had to wait until the 2001–02 season to become first-choice, but his team would again be relegated. He was instrumental in the Aragonese side's immediate promotion, and subsequently helped it finish in a comfortable 12th place, also conquering that season's domestic cup after an extra time win against Real Madrid.
Láinez spent the entire 2004–05 campaign recovering from knee surgery, and would ultimately retire from football in May 2005, at only 28. He subsequently became a sports commentator for local TV channels.
- Galletti gives Zaragoza glory; UEFA.com, 17 March 2004
- El club de las rodillas rotas (Shattered knees society); Heraldo, 29 July 2010 (Spanish)
- Barcelona end season in stalemate; UEFA.com, 28 May 2005
- Keeper Lainez retires