The Chargers later announced the move.
Flowers will earn $3 million in guarantees with a chance for an additional $2 million in incentives, a source informed of the deal has told NFL Media Insider Ian Rapoport.
The Bolts pursued him more aggressively than other interested teams as speculation mounted that the veteran cornerback was seeking too much money on the heels of a disappointing season.
One of those teams was the San Francisco 49ers, who hosted Flowers on Friday, per Rapoport.
Although Flowers proved ill-suited for Bob Sutton's press-man scheme in Kansas City, he played at a Pro Bowl level as a shadow corner under Romeo Crennel from 2010 to 2012. Undersized first-round draft pick Jason Verrett was billed as a prototypical slot cornerback, which should allow Flowers to stay outside -- where he wants to play.
It's rare to find a quality starter on the open market this time of year. The Chargers did well to improve their shaky secondary heading into training camp.