The Miami Dolphins announced several roster moves today, including the return of safety Jonathon Amaya. In addition to Amaya, the team also signed linebacker Mike Rivera, while waiving tackle Ray Feinga and safety Troy Nolan.

Amaya returns to the Dolphins after spending 2011 with the New Orleans Saints. Amaya, who was originally with the Dolphins in 2010, was traded to the Saints when the Dolphins acquired Reggie Bush. Amaya originally joined the Dolphins as an undrafted free agent from Nevada. He started the 2010 season on the Dolphins' practice squad before being promoted mid-season to the active roster. He made 10 appearances for the Dolphins, recording 15 tackles, mostly on special teams.

With the Saints, Amaya appeared in all 16 games last season, forcing one fumble and recording fourteen tackles.

Rivera is likewise making a second stint with the Dolphins. He was signed as an undrafted free agent in 2009 by the Chicago Bears, spending time on the practice squads for the Bears, Tennessee Titans, Green Bay Packers between 2009 and 2010. He initially spent the end of the 2010 season with the Dolphins after they signed him from the Packers' practice squad in December. After he was released in August 2011, he was signed by the Patriots where he spent the 2011 season on the team's practice squad. He appeared in two games this season with the Patriots before they released him this year.

Rivera was a three tear starter at Kansas with 300 career college tackles.