The defensive end suffered from bipolar disorder that derailed his career after he was chosen by Minnesota in the first round of the 1999 NFL Draft. After his first training camp practice, he fled to Philadelphia, where he was found four days later. The Vikings cut him and he signed a one-year deal with Miami, but in October of that year, Underwood, whose religious devotion was obsessive, slashed his own neck with a knife and was found wandering the street bleeding, telling a police officer, "I am not worthy of God." He checked into a mental health facility for treatment, but later escaped. After playing in 19 games for Dallas in 2000 and 2001, he tried to kill himself by running into traffic and later had several brushes with the law.