"Since Garrett entered the league as an undrafted rookie free agent in 2012, he has displayed the skill, work ethic and desire to compete at a high level in the National Football League," said 49ers general manager Trent Baalke. "His commitment and determination to succeed are reflected in the way he conducts himself as a professional on and off the field. As an organization, we would like to congratulate Garrett and look forward to his continued development as a member of this organization."