Boothe returned on a one-year deal, a source said. The team didn't announce the terms of Booth's contract.
"I'm happy to be back," Boothe said in a statement on the team's website. "It's a great organization and a great team. I'm looking forward to this upcoming season."
Boothe, 29, was the Giants' biggest priority after the team was able to lock down left tackle Will Beatty before free agency began. The Giants love Boothe's versatility as the 6-foot-5, 320-pound lineman can play both the guard and center positions.
"I think he's a great player," right guard Chris Snee said last week at a Boost Mobile event in New York. "He's been very important to us the past couple years."
Boothe was solid in his first full year as a starter, starting all 16 games for the Giants in 2012. With Boothe in at left guard, the Giants finished 14th in rushing (116.4 yards per game) and allowed just 20 sacks in 2012. He has started 25 games over the past two seasons.
Boothe said he is "happy do whatever is needed," according to the team's website. "I'm going into my seventh year here with the Giants. Whatever role they need me to be in, I'm more than happy to fill. Whether it was the first person off the bench in years past or being the starter this past year, I approach every day with 100 percent effort. Whatever I can do to help the team, that's what I'm all about."
With both Boothe and Beatty back on the left side, the Giants can focus on who will start at right tackle. James Brewer and David Diehl are options but it remains to be seen what the Giants will do with Diehl, who is entering the final year of his contract, worth $4.475 million in base salary. Co-owner Steve Tisch recently intimated that the team will work with Diehl on altering his contract for a possible pay cut.
The Giants also have some health concerns on the line as Snee and center David Baas are both returning from offseason surgeries. Both hope to be ready by the time training camp begins.