The Miami Dolphins signed linebacker Josh Kaddu to their active roster from the practice squad and signed defensive end Louis Nzegwu to fill his spot on the practice squad. Kaddu was a fifth-round pick in the 2012 draft and was with the team during training camp prior to being waived Sept. 1, 2012. The Oregon product was a strong-side linebacker in the Ducks' 4-3 defense. He's likely to be used primarily on special teams. Nzegwu was an undrafted free agent in April and signed with the Falcons. He started 27 games at Wisconsin and had 11 career sacks.