The Denver Broncos added a veteran presence to their linebacking corps yesterday, signing 15-year pro Keith Brooking to a one-year deal. Brooking started just three games last season for the Dallas Cowboys after starting 158 of 160 games the previous ten seasons. Prior to spending three seasons with the Cowboys, Brooking played eleven seasons with the Atlanta Falcons, making five Pro Bowl appearances. Brooking will begin practicing with the team on Saturday.