- The Dolphins also promoted TE Thomas Duarte to their active roster.
Thomas, 29, is a former fourth-round pick by the Broncos in the 2011 NFL Draft. He is in the third year of his five-year, $46 million contract that included $24 million guaranteed and stands to make a base salary of $6.5 million for the 2018 season.
The Jaguars elected to trade Thomas to the Dolphins in return for a 2017 seventh-round pick.
In 2017, Thomas appeared in 14 games for the Dolphins and caught 41 passes for 388 yards receiving and three touchdowns. ProFootballFocus has him rated as the No. 52 overall tight end out of 74 qualifying players.
Smith, 22, wound up signing a three-year, $1.66 million contract with the Dolphins as an undrafted free agent out of Virginia back in May. He stands to make base salaries of $465,000 and $555,000 over the first two years of the contract.
The Dolphins placed him on injured reserve coming out of the preseason with a knee injury before designating him to return a few weeks ago.