Lucas began his career as a box-to-box midfielder at Grêmio where he won the Campeonato Gaúcho in 2006 and 2007. In July 2007 he moved to Liverpool, where he played 347 professional matches over the course of a decade, winning the League Cup in 2012. Between 2010 and 2016 Lucas led the Premier League in tackles per game five times in six seasons.He has the most tackles in Premier League history. He also remains the Brazilian with the most Premier League appearances. He joined Lazio in 2017.