On Wednesday, the Dolphins decided on their specialists for 2013.
On Thursday, they ensured all three will be under contract through 2016.
Long snapper John Denney, who was entering the final year of his contract, has signed a three-year contract extension, the team announced Friday morning. The deal is worth about $1.2 million per season.
Denney, the 6-5, 255-pounder, enters his ninth season in the NFL, all with the Miami Dolphins. In his career, he has played in 128 consecutive games, which places second all-time in Dolphin history.
Denney has amassed 34 special teams tackles, one forced fumble, and one fumble recovery over his career. He originally joined the Dolphins as a undrafted free agent following the 2005 NFL Draft.
Earlier in the week, Caleb Sturgis was named the team's kicker. Sturgis, Denney and Brandon Fields all have four years left on their respective deals.