The $5.5 million extension includes $3.25 million guaranteed at signing, according to Rapoport.
The Ravens confirmed the news via Twitter and Fort appears excited to have signed the extension.
Fort was cut by the Philadelphia Eagles five weeks ago when the Ravens picked him up.
Since coming to the Ravens, Fort has eight solo tackles, with a high point of five during Baltimore's 30-16 win over Seattle.
MORE RAVENS NEWS:
Taco love: Judon loves tacos
Under the weather: Jackson misses practice
Settled in: Richards is moving on from the Patriots
Ravens sign LJ Fort to two-year, $5.5 million extension originally appeared on NBC Sports Washington