From TheChels.info - The Chelsea Football Club Wiki
|Full Name||Gustavo Lucas Domingues Piazón|
|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|
Vitesse Arnhem (loan)
Eintracht Frankfurt (loan)
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.
For the 2013-14 season, Piazón joined Vitesse Arnhem along with five other Chelsea loanees as part of the club's affiliate program. He became an instant hit, scoring twice at home to Zwolle before netting a last-minute winner in a derby match away to NEC Nijmegen. As Vitesse mounted a title challenge in the first half of the season, the Brazilian established himself as the Eredivisie's standout player and racked up eleven goals and eight assists by the winter break.
Thereafter, however, things didn't quite go to plan. Vitesse fell down the standings in the second half of the season and eventually missed out on European qualification whilst Piazon failed to weigh in with any more goals or assists, eventually losing his place in the team.
He joined Eintracht Frankfurt on loan for the 2014-15 season. A good start was highlighted by a spectacular free kick scored away to Hamburg but it proved to be just one of two strikes all season as he flitted between starting roles and the substitutes' bench. Back in England for 2015-16, he joined Reading on a season-long stay but the story was much the same, even down to the occasional spectacular set piece. He chipped in with half a dozen goals without ever holding down a regular place in the side and returned to Chelsea two weeks before the end of the campaign.
Lucas has represented Brazil up to Under-23 level, featuring in the 2011 FIFA Under-17 World Cup, the 2014 Toulon Tournament and the 2015 Pan-American Games.
Youth, Reserve and Under-21 Football
First Team Football
|Season||Club||Prem||FA Cup||League Cup||Europe||Other||Total|
|2013-14||Vitesse Arnhem (loan)||29||11||2||0||0||0||0||0||0||0||31||11|
|2014-15||Eintracht Frankfurt (loan)||22||2||1||0||0||0||0||0||0||0||23||2|
(Statistics accurate as of the end of the 2015-16 season)
- Toulon Tournament: 2014
Having signed an extension in August 2015, Lucas' contract expires at the end of the 2017-18 season.