Injuries have been a problem for Te'o throughout his NFL career. The 26-year-old has yet to play a full season since the Chargers selected him with the 38th overall pick in the 2013 draft.
When he has been healthy enough to play, Te'o's on-field returns have been mixed. Pro Football Focus has given him overall grades of 50.4, 74.9, 34.8 and 38.3 in his four years in the league.
If Te'o were the only middle linebacker New Orleans added to a unit that ranked 30th in defensive efficiency, per Football Outsiders, then the move would be somewhat concerning. However, the Saints already signed another inside linebacker, A.J. Klein.
With Klein on board, the Saints would be able to pencil in Te'o as a reserve, a role that makes sense given his injury history.
Should Te'o stay healthy, he could be a nice bargain for New Orleans. In the event durability or performance issues crop up again, his signing shouldn't be a costly mistake for the team.