Complex sentence: Sergej Barbarez, who played for several clubs in the German Bundesliga including Borussia Dortmund, Hamburger SV and Bayer Leverkusen was joint-top scorer in the 2000--01 Bundesliga season with 22 goals.
Split into simpler sentences: Sergej Barbarez, who played for several clubs in the German Bundesliga including Borussia Dortmund, Hamburger SV and Bayer Leverkusen. He was joint-top scorer in the 2000--01 Bundesliga season with 22 goals.