Roby, 31, is a nine-year NFL veteran who most recently played with the New Orleans Saints in 2022 before being released ahead of the season in a salary-saving move.
A former first-round pick of the Denver Broncos in 2014, Roby could serve as additional depth at cornerback for the 49ers, who lost second-year cornerback Samuel Womack to Injured Reserve on Saturday.
Womack suffered an MCL sprain during Wednesday's practice last week, with head coach Kyle Shanahan believing the timetable for a return is around six-to-eight weeks, although the cornerback will not require surgery.
Roby has experience in the nickel and on the outside, having played with the Denver Broncos, Houston Texans, and New Orleans over the duration of his career.
Playing in 13 games last season, Roby amassed 36 tackles, five passes defended, two fumble recoveries, and a tackle for loss.
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San Francisco 49ers
Out
G Ben Bartch...
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