During the Rickey 's five - year tenure , Pittsburgh will endure three 100 - loss seasons .
1955 Branch Rickey steps down as the Pirates ' general manager and will be replaced by Joe L. Brown .
During the Branch Rickey 's five - year tenure , Pittsburgh will endure three 100 - loss seasons .
1955 Branch Rickey steps down as the Pirates ' general manager and will be replaced by Joe L. Brown .