Pang was criticized by Cao Cao's advisor Xun Yu as "brave but heedless of other's opinions." Being very bitter towards his rivals, Pang slandered Tian Feng after Yuan Shao's defeat at the Battle of Guandu and caused Tian to commit suicide. Pang later went on to serve under Yuan Shang, Yuan Shao's successor. Since Yuan Shang was the youngest of Yuan Shao's three sons, there was intense sibling rivalry. Yuan Shao's oldest son Yuan Tan was on the verge of rebellion, and Pang and Shen Pei suggested sending a small army to aid Yuan Tan in the defense against Cao Cao's follow-up attacks in order to resolve the tension. Pang went along as an emissary. However Yuan Tan was not pleased with the reinforcements and demanded that Yuan Shang send more troops. He was flatly refused by Shen Pei and he killed Pang in anger.