The Falcons have already announced the move.
Matthews is now a top-three highest-paid offensive lineman with this new deal.
This comes just an hour after the Titans locked up LT Taylor Lewan to a record-breaking five-year, $80 million extension.
Recent reports had said that the Falcons were focusing on getting a long-term deal with Matthews, among others, and it looks like the two parties were able to get an agreement in place well in advance of the regular season.
Matthews, 26, was taken with the No. 6 overall pick by the Falcons back in 2014. He was entering in the final year of his four-year, $16.5 million rookie contract and set to make a base salary of $690,000 for the 2017 season when the Falcons picked up his fifth-year option last year.
Matthews now stands to make a base salary of $12.496 million for the 2018 season.
In 2017, Matthews appeared in all 16 games for the Falcons and was rated by Pro Football Focus as the No. 14 offensive tackle out of 81 qualifying players.
We had him featured in our Top 25 – 2019 NFL Free Agents list.