The Bucs are preparing to face the New York Giants Sunday without linebackers Lavonte David and Kwon Alexander.
Defensive coordinator Mike Smith said rookie Kendell Beckwith, a third-round pick from LSU, would be given the helmet transmitter and responsible for calling the defense.
David began the Bucs' 34-17 loss to the Vikings Sunday with the helmet transmitter until he suffered an ankle injury. From that point on, Beckwith called the defense.
Alexander started the season opener against the Chicago Bears but did not finish the game after aggravating a hamstring injury and did not play against the Vikings.