This will be the 31-year-old Stallworth's second stint in New England. He was on the 2007 Patriots team that started 18-0 before losing in the Super Bowl. He had 46 receptions for 697 yards and three touchdowns that season.
Stallworth spent the next season with the Cleveland Browns, but was suspended for the entire 2009 season after pleading guilty to DUI manslaughter charges in Miami. He was back in the NFL in 2010 with the Baltimore Ravens and played for the Washington Redskins last season.
Over the last two seasons, he combined for 24 catches for 391 yards and two touchdowns. Over his nine-year career, he has 320 receptions 4,774 receiving yards and 34 touchdowns.
Earlier Monday, Stallworth post the following message to his Twitter account: "This time around, things will be different...."
The Patriots locked up their top receiver this offseason by placing the franchise tag on Wes Welker.
The signing of the trio of receivers calls into question the future of receiver Deion Branch, who spent last season in New England and is a free agent, and Chad Ochocinco, who is under contract with the Patriots but theoretically could be cut if he doesn't restructure his deal.