FC Barcelona -Official website of the club, where players like Messi, Iniesta, and Xavi made their mark.

RCD Espanyol -Barcelona's second biggest soccer club after FC Barcelona

Catalonia -official team of the Spanish autonomous community of Catalonia (Wikipedia entry) (Scores?)

Catalan is important in chess too! A popular opening for white is called "Catalan opening"

Lionel Messi. Lionel Messi is not Catalan! He was born in Rosario (Argentina) (1987). He has been playing in F. C. Barcelona since age 13, and thereby has become one of F.C. Barcelona's signal players.

Does Messi speak Catalan? Hum... not clear.

You don't know who Messi is?? 

Pau Gasol. Pau Gasol plays (ok, played) for the Lakers, but he IS Catalan.