Dugger and the Patriots agreed Sunday on a four-year, $58 million deal, Ian Rapoport of NFL Network reports.
The Patriots will place the transition tag on Dugger, Andrew Callahan of the Boston Herald reports.
Dugger logged a career-high 109 tackles, to go along with two interceptions and 1.5 sacks in 17 games with the Patriots during the 2023 regular season.
Dugger finished with 10 tackles (seven solo) and a pass defensed in the Patriots' 27-21 loss to the Bills on Sunday.
Dugger (undisclosed) is available for Sunday's tilt verus the Bills.
Dugger had nine tackles (seven solo) including one sack and an interception in Sunday's 31-17 loss to the Dolphins.
Dugger (toe) is active for Sunday's contest against the Raiders.
Dugger (foot) is listed as questionable for Sunday's game at Las Vegas.
Dugger (foot) was a limited participant at practice Thursday, Evan Lazar of the Patriots' official site reports.
Dugger recorded 15 tackles (12 solo), one tackle for loss and one hit on the quarterback during Sunday's 38-3 loss to Dallas.