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FLOWERY BRANCH, Ga. (AP) _ Atlanta Falcons running back T.J. Duckett will not play Sunday against the Pittsburgh Steelers because of a sprained left ankle.

Duckett, Atlanta's first-round draft pick this year, will miss his second game because of injury. He sat out a 37-35 victory over New Orleans two weeks ago with an ailing right foot.

Duckett's absence means the bulk of the running duties will fall to Warrick Dunn, who ran for 142 yards against the Saints.

The Falcons (5-3), who have a four-game winning streak, also will be without reserve cornerback Juran Bolden because of a dislocated right kneecap. He will miss his second straight game.