Izzo agreed to a contract with the Titans on Tuesday, Doug Kyed of Pro Football Focus reports.
The 26-year-old has been on the Seahawks' practice squad but will now join the Titans with MyCole Pruitt (ankle) placed on injured reserve. Izzo has yet to see game action this season and caught 13 passes for 199 yards with New England in 2020. He should work as Tennessee's No. 3 tight end behind Geoff Swaim and Anthony Firkser.