Matthews, 28, is a former seventh-round pick of the Dolphins back in 2012. He spent four years in Miami before signing a three-year, $15 million contract with the Titans in 2016.
Matthews was set to make a base salary of $5 million for the 2018 season when he agreed to a new one-year extension last month worth a base value of $7.75M for the 2019 season. The Titans elected to cut him loose shortly after he requested his release from the team.
The Browns also worked out Matthews on Monday, but he left Cleveland without a contract.
In 2018, Matthews has appeared in three games and caught three passes for 11 yards receiving and no touchdowns.
We have him featured in our Top 50 Available 2018 NFL Free Agents list.
Carlson, 23, was selected in the fifth round of this year’s draft by the Vikings. He was in the first year of his four-year, $2,708,012 contract when the Vikings elected to cut him loose a few weeks ago.
In 2018, Carlson has appeared in two games and converted one of four field goal attempts all six of his extra point tries.