Key's career-high 6.5 sacks ranked second among his 49ers teammates this past season, behind Nick Bosa's 15.5. It was his only year with the team after spending his first three NFL seasons with the Las Vegas Raiders.
Street also recorded 22 tackles, five tackles for a loss, 17 quarterback hits, and a pass defensed through his 17 game appearances with San Francisco.
The 49ers have already lost three defenders in free agency. They are defensive linemen D.J. Jones and Kentavius Street, and cornerback K'Waun Williams. Jones and Williams signed with the Denver Broncos while Street joined the New Orleans Saints.
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