The Dolphins elected to not activate Barrett from the reserve/retired list before Thursday's 4:00 p.m. deadline, Christian Gonzalez of NFL.com reports.
Barrett applied to be reinstated from retirement to play immediately Tuesday, Adam Schefter of ESPN reports.
Barrett has informed Miami that he intends to retire, Adam Schefter of ESPN reports.
Barrett signed a one-year contract, which could be worth up to $9 million, with the Dolphins on Tuesday, Adam Schefter of ESPN reports.
Barrett is expected to be released by the Buccaneers before his $15 million option bonus is due next month, Adam Schefter of ESPN reports.
Barrett (ankle) is active for Sunday's divisional-round game against the Lions.
Barrett (ankle) returned to practice Friday and will be listed as questionable for Sunday's game in Detroit, Greg Auman of Fox Sports reports.
Barrett (groin) was listed as a full participant on Wednesday's injury report, Adam Caplan of SiriusXM NFL Radio reports.
Barrett (groin) will have a chance to suit up Sunday against the Panthers, Greg Auman of Fox Sports reports.
Barrett (groin) is out for Sunday's game versus the Saints, Greg Auman of Fox Sports reports.