Tavai, 24, joined the Patriots’ practice squad at its formation and is scheduled to revert on Monday.
The 6-foot-2, 250-pound Hawaii product entered the NFL with the Detroit Lions in the second round of the 2019 draft at pick No. 43 overall. Through 31 games and 16 starts for the organization, Tavai recorded 116 tackles to go with two sacks, three forced fumbles and one interception. He played 1,221 snaps on defense and 215 snaps on special teams over that span.
Tavai would be waived by Detroit at the roster deadline in August before reuniting with his former head coach and current senior football advisor Matt Patricia.
New England entered the weekend with an active roster of 53 and practice squad of 16. According to the transaction wire, interior offensive lineman Jake Eldrenkamp has since been released from the practice squad after signing on Wednesday.
Kickoff at Gillette Stadium is set for 1 p.m. ET.