Across his career Lionel Messi has been a prolific goalscorer.
Lionel Messi . His personal best campaign to date was the 2011 -- 12 season , in which he set the La Liga and European records for most goals scored in a single season , while establishing himself as Barcelona 's all-time top scorer in official competitions in March 2012 . Messi regained his best form during the 2014 -- 15 campaign , breaking the all-time goalscoring records in both La Liga and the Champions League in November 2014 , and led Barcelona to a historic second treble . An Argentine international , Messi is his country 's all-time leading goalscorer .