New Orleans Saints general manager Mickey Loomis submitted a revised contract proposal to Drew Brees' representatives Thursday in an attempt to break the deadlocked negotiations with the Super Bowl-winning quarterback, according to a source close to the discussions.

Agent Tom Condon, who represents Brees, and Loomis have been seeking to resolve a salary difference of approximately $2 million per year. The two sides resumed a dialogue early this week after a long period of relative silence, the source said.

But another source familiar with the negotiations said the renewed talks have not created a significant breakthrough despite the Saints' latest proposal.

Differences still remain over guaranteed money, among other details. Brees has been seeking an average salary in the $20.3 million range, and has provided mechanisms for the Saints to lower his salary cap number during the contract term, sources said.

It is not known how much Loomis improved the team's previous offer or whether it will prove to be acceptable to Brees and his representatives, who are believed to be evaluating it.

A source close to the negotiations previously told ESPN that Brees, 33, has taken a hard stance in negotiations because he understands that this could be the final contract of his NFL career.

Brees, who broke Dan Marino's single-season passing record last season, has been the league's most prolific passer since signing with the Saints in 2006.

With this deal, he could surpass Peyton Manning to become the NFL's highest-paid player.

Loomis has not responded to a text message seeking confirmation or comment.

The Saints on Thursday completed mandatory minicamp that Brees was forced to miss since he is unsigned and has not accepted the franchise tender.