In a September 28, 2010 article Yahoo Sports noted Underwood's mental health issues as a case in point in regard to the NFL falling short in helping players who suffer from various mental illnesses that are in no small part connected to the pressures of the job of an NFL athlete. The 2010 article also pointed out that "Underwood was tormented by visions of the apocalypse. He used to write notes discussing the end of the world on pieces of paper the size of postage stamps. When he was in a normal state, he could be engaging in conversation. He was funny and intelligent. He also exuded physical confidence and had extraordinary talent."