The New England Patriots could fill a major need via trade.

The Patriots have shown interest in trading for Philadelphia Eagles left guard Evan Mathis, a source told the Boston Herald’s Jeff Howe on Thursday. The Eagles are “working to trade” Mathis, a source told NFL Media’s Ian Rapoport.

Mathis was named to the 2013 and 2014 Pro Bowls, and he was a first-team All-Pro in 2013. The 33-year-old offensive lineman carries a $5.5 million base salary in 2015 and $6 million base salary in 2016.

The Patriots’ offensive line struggled in 2014 until they settled on a unit consisting of left tackle Nate Solder, left guard Dan Connolly, center Bryan Stork, right guard Ryan Wendell and right tackle Sebastian Vollmer. Connolly is a free agent, and he had an up and down season, struggling through injuries.

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