The Redskins released Flowers on Saturday, per the NFL transactions page.
Flowers has been ruled out for the rest of Thursday's preseason game against the Falcons due to an Achilles strain.
Flowers signed with the Redskins on Wednesday.
Flowers signed a contract with the Lions, Michael Rothstein of ESPN reports.
Flowers was released by the Patriots on Saturday, Karen Guregian of the Boston Herald reports.
Flowers (illness) is officially active for Saturday night's divisional round game against the Titans.
Flowers (illness) is listed as questionable for Saturday's game against the Titans.
Flowers tallied 10 tackles (five solo) and 2.5 sacks in Sunday's 37-16 defeat of the Bills.
Flowers (knee) is officially active for Monday night's game against the Dolphins.
Flowers (knee) is active for Sunday's game against the Bills.