Amos Pieper is a German centre-back who developed at Borussia Dortmund and made his senior breakthrough with Arminia Bielefeld. He helped Bielefeld win promotion to the Bundesliga and remained a regular defender in the top flight. Werder Bremen signed him in 2022. Pieper represented Germany at youth levels and was part of the squad that won the 2021 UEFA European Under-21 Championship.