The Patriots are set to visit with a pair of defensive free agents on Friday.
Trufant was released by the Lions after playing six games in his one season with the team. Matt Patricia was the head coach for most of that season and has reportedly returned to the New England after being fired with five games left in the 2020 campaign.
McMillan was a Dolphins second-rounder in 2017 and was traded to the Raiders last year. He was mostly a reserve while appearing in every game and finishing the year with 27 tackles and a forced fumble.