Olaf Pollack has tested positive for an unnamed banned substance, according to the German cycling federation (BDR) on Thursday. The 35-year-old German, a 2000 Olympian, began his professional career with Gerolsteiner in 2000 and moved to T-Mobile in 2005 for two years. The BDR also announced that another cyclist, Marcus Cronjager, tested positive for an unnamed substance on July 11. 