"He indicated to the coach today that he had played a long time and had played enough," Broncos spokesman Jim Saccomano said.
Smith, a No. 1 draft choice of the Raiders in 1990, had 54½ sacks, five fumble recoveries and two forced fumbles in his career. Last year, he played 13 games and had 6½ sacks.
Smith was trying to join a defensive line that includes ends Neil Smith, Alfred Williams, Harald Hasselbach and Marvin Washington, who signed as a free agent from San Francisco. Maa Tanuvasa is the top defensive tackle.
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