The Patriots cut Allen (leg) with a failed physical designation, Aaron Wilson of the Houston Chronicle reports.
The Patriots released Allen (leg) on Thursday, Field Yates of ESPN reports.
Allen (leg) suffered a setback last week at practice and won't return from injured reserve this season, Jim McBride of The Boston Globe reports.
Allen (undisclosed) returned to practice Wednesday, indicating the start of his 21-day window to be activated from IR, Mike Dussault of the Patriots' official site reports.
The Patriots placed Allen (undisclosed) on injured reserve Monday, Field Yates of ESPN reports.
Allen (ankle) is likely to take over Danny Shelton's starting spot at defensive tackle in 2020, Tom Curran of NBC Sports Boston reports.
The Patriots and Allen (ankle) agreed to terms on a contract Wednesday, Doug Kyed of NESN.com reports.
Allen (ankle) has been ruled out for Sunday's game against the Falcons, Jenna Laine of ESPN.com reports.
Allen (ankle) is ruled out for Saturday's contest against the Texans, Greg Auman of The Athletic reports.
Allen (ankle) was wearing a walking boot in the locker room Tuesday, Greg Auman of The Athletic reports.