Bob Quinn and the Lions got their guy.
Flowers, 25, was a fourth-round pick of New England in 2015 and blossomed under under Matt Patricia in 2016.
Quinn made it clear heading into the offseason that Detroit needed more playmakers on defense. He reeled in a big one Monday.
The Lions can officially sign Flowers when the new league year opens on Wednesday.
It's been a busy Monday for the Lions. They also signed wide receiver Danny Amendola (who was released by the Dolphins over the weekend) and reportedly agreed to another expensive deal with cornerback Justin Thomas.
Like Flowers, both players are former Patriots.