The striker, Poland's all-time leading scorer, arrives in the United States with a career record of more than 700 goals across clubs and country.
The Chicago Fire highlighted the scale of his achievement, noting that his career honours include the Champions League, the European Super Cup and the Club World Cup with Bayern Munich, ten Bundesliga titles with the same club, and three La Liga titles, a Copa del Rey and three Spanish Super Cups with Barcelona. He also won the most recent La Liga title with the Catalan club before his contract expired.
At international level, Lewandowski has captained Poland since 2013 and scored 89 goals in 167 appearances for his country.
Chicago Fire also pointed to the team's performance record in 2025, when the club set a new benchmark of 68 goals scored in MLS competition — a context into which Lewandowski arrives as one of the game's most prolific finishers of the modern era.
His move resolves weeks of speculation over his next destination, ending with the striker choosing MLS over the significant financial offers that had come from Saudi Arabia.
The confirmation ends a summer of speculation that had linked him with multiple destinations. His decision to join Chicago rather than accept Saudi Arabia's financial pull reflects a desire to remain visible in a competitive league as he enters the later stages of his career.
Lewandowski's contract to 2027-28 means he will spend at least two full MLS seasons in Illinois. The Fire now have one of the most decorated strikers in European football history on their books — a signing that will generate attention well beyond the boundaries of American soccer.