Centre back Amos Pieper is leaving relegated Bundesliga club Arminia Bielefeld for promoted Werder Bremen, his new club announced on Wednesday. Bremen said that Pieper arrives on a free transfer while giving no contractual details. Pieper, 24, played 101 official matches for Bielefeld and the former under-21 international was part of Germany’s squad at the 2021 Tokyo Olympics. “Amos is physically strong, has the ability to play out from the back and is strong in the air. He has already proven that he can mix it with the big boys in the Bundesliga,” Bremen coach Ole Werner said. Pieper said: “T…