The Cowboys signed WR Laurent Robinson and waived FB Tony Fiammetta on Wednesday.
Robinson, a fifth-year veteran, had 34 catches for 344 yards and two touchdowns last season for the Rams in 14 games. He had 437 yards receiving in his rookie season with the Falcons.
Fiammetta was the team's only fullback. He played in 14 games with nine starts last season for the Panthers.
Robinson is the Cowboys' sixth wide receiver.