Original Puma football shirt S.S. Lazio 2000/01

Lucas Martín Castromán(born 2 October 1980) is a retired Argentine footballer, who played as an attacking midfielder, right midfielder, or right winger.

Castromán began his professional career with Vélez Sársfield in 1997, with Marcelo Bielsa as a coach. His consistent performances in midfield awarded him a lucrative transfer to S.S. Lazio in the Italian Serie A, in 2001. There he became suddenly popular amongst Lazio's fans because of a late equalising goal scored in the very last minute of a derby against cross-city rivals AS Roma that were leading the game 2–1 until then. During his time at Lazio, he was awarded an Italian passport, thus counting as an EU player.

In 2003, he was loaned to fellow Italians Udinese before returning to Vélez in 2004.