From TheChels.info - The Chelsea Football Club Wiki
|Full Name|| Gustavo Lucas|
|Date of Birth||20 January 1994|
|Place of Birth||Curitiba, Brazil|
|Chelsea career||2011 -|
|Debut||25 September 2012|
|Games (goals)||3 (0)|
|Other clubs|| Sao Paulo|
Gustavo Lucas Domingues Piazón, known as Lucas Piazón, (born 20 January 1994 in Curitiba, Brazil) is an attacking midfielder who currently plays for Chelsea. He arrived at the club aged 17, before joining officially after turning 18. He helped the youth team to victory in the FA Youth Cup in 2012, before making his debut for the first team later the same year.
Lucas first came to Chelsea's attentions in the 2009 Manchester United Premier Cup tournament, where as a 15 year-old he was one of the stars of the competition. He stayed on the club's radar and they agreed a deal to sign him for a fee, which could rise up to £8m, in early 2011. 
Lucas was scheduled to arrive upon his 18th birthday in January 2012, but an agreement between Chelsea and Sao Paulo saw him move to London in September 2011 to acclimatise. His international registration was transferred in November and he made his debut against Fulham Under-18s on November 12th 2012.
He was given the number 35 shirt by then first team boss Andre Villas-Boas and included on the substitutes bench for a handful of Premier League matches, and made the bench again on the last day of the season, but didn't make his first team bow during the 2011-12 season. Instead, he thrived for the Youth and Reserve teams and was one of the outstanding players in the 2011-12 FA Youth Cup, scoring twice en route to lifting the cup.
Lucas made his first team debut early in the 2012-13 season, starting and playing the full match in a League Cup 3rd round victory against Wolverhampton Wanderers. He made his Premier League debut in Chelsea's 8-0 victory over Aston Villa, a game in which he laid on an assist for fellow Brazilian Ramires before later on missing a penalty.
In the January transfer window, he joined Spanish club Málaga on loan for the remainder of the season. He featured as a bit-part player whilst in Southern Spain, but managed to make two appearances in the Champions League whilst earning valuable experience.
Lucas has represented Brazil at Under-15 and Under-17 levels, featuring in the 2011 FIFA Under-17 World Cup.
Youth, Reserve and Under-21 Football
First Team Football
|Season||Club||Prem||FA Cup||League Cup||Europe||Other||Total|
(Statistics accurate as of the end of the 2012-13 season)
Having signed an extension in January 2012, Lucas' contract expires at the end of the 2016-17 season.