The 2015-16 campaign was a triumphant season of silverware and European exploits for Athletic Bilbao. Los Leones spectacularly defeated Barcelona 5-1 on aggregate to win the Supercopa de España, clinching the club's first trophy since 1984. They also secured a strong 5th-place finish in La Liga, ensuring a return to European competition. Leading the charge was the legendary veteran striker Aritz Aduriz, whose 20 league goals were part of an incredible 36 goals across all competitions, a tally that saw him become the oldest-ever top scorer of the UEFA Europa League with 10 goals. It was a standout year that re-established the club's status as a major force and remains a defining chapter in their modern history.