The Patriots waived McMillan on Friday.
McMillan is expected to move into a starting role beginning Thursday against the Jets, Khari Thompson of Boston.com reports.
McMillan (Achilles) was spotted working on during the Patriots' mandatory minicamp session Wednesday, Doug Kyed of The Boston Herald reports.
McMillan (Achilles) was placed on injured reserve Thursday, Tom Pelissero of NFL Network reports.
The Patriots re-signed McMillan to a one-year contract extension worth up to $2.2 million Monday, Mark Daniels of MassLive reports.
McMillan recorded three tackles (two solo) and a fumble recovery for a 23-yard touchdown in Monday's 27-13 victory versus Arizona.
McMillan (thumb) is active for Sunday's game against Detroit.
McMillan (thumb) is listed as questionable for Sunday's matchup against Detroit.
McMillan (thumb) was a limited participant in practice Friday.
McMillan (thumb) is listed as inactive for Sunday's game against the Patriots.