Logan Mankins contract details

FOXBOROUGH, Mass. -- Here are the details of Logan Mankins' contract extension, according to a source:

The six-year, $51 million deal extends through 2016.

Signing bonus

$20 million

Base salaries

2011: $1.5 million

2012: $3 million

2013: $6 million

2014: $6.5 million

2015: $7 million

2016: $7 million

There are also workout bonuses of $250,000 for Mankins on a yearly basis, which if counted in the total value, ups it to $52.25 million.

When looking solely at those numbers, the deal makes Mankins the highest paid interior offensive lineman in the NFL, with about an $8.5 million per year average.

From this perspective, it looks like the Patriots gave Mankins credit for playing 2010 at a prorated $1.5 million salary and stepped up with a top-of-the-line offer that Mankins could have commanded on the open market. One of the benefits to the team in doing so is that Mankins' salary cap charge of $10.1 million also gets reduced to about half of that.

For Mankins, he doubled his money this year -- from $10.1 million to $21.5 million -- while earning more long-term security in the process.

A win-win for both sides.