Source: 3-year pact with Fells

While final details are still being worked out between the Patriots and free-agent tight end Daniel Fells, the sides have agreed on enough parameters that the expectation is Fells will be with the club.

The length of the contract will be three years, according to a source. Fells is expected to earn around $2 million per season with a chance for additional pay based on escalators.

The length of the deal is consistent with how the Patriots have approached free agency this year. They haven't signed a free-agent to a deal longer than three years, and have focused on the middle class of the roster.

Fells, 28, adds depth at a position where the Patriots had little in the form of insurance in 2011 -- only Rob Gronkowski and Aaron Hernandez were on the roster.

Fells is meeting with the club today. Barring a setback, he will be the sixth free agent the team has inked from other clubs, joining Jonathan Fanene (Bengals), Steve Gregory (Chargers), Trevor Scott (Raiders), Anthony Gonzalez (Colts) and Brandon Lloyd (Rams).