This move will free up $2.17 million in available cap space for the Lions, according to Yates.
Quin, 29, signed a five-year, $23.5 million contract with the Lions as an unrestricted free agent in March of last year. He has three years remaining on the agreement with base salary of $4 million (2015), $4 million (2016), and $4 million (2017).
In 2014, Quin appeared in all 16 games for Detroit and recorded 72 tackles, seven interceptions, and 11 pass defenses. Pro Football Focus has him rated as the No. 3 safety out of 87 qualifying players.