The 49ers swapped cornerbacks on Saturday, promoting preseason standout Asa Jackson from the practice squad and waiving Keith Reaser.
Both have the ability to play both outside and nickel cornerback for the 49ers. Reaser, 26, was active for San Francisco’s Week 1 loss to Carolina but played only on special teams. Jackson, 27, likely will be in uniform Sunday against Seattle because of his versatility.
Jackson, who played at Christian Brothers High School in Sacramento, was a late addition during training camp. However, he caught on quickly and grabbed two interceptions in the team’s preseason finale against the Los Angeles Chargers.
His addition gives the 49ers three Sacramento area players -- Arik Armstead and Ahkello Witherspoon are the others -- on the 53-man roster. Witherspoon also played at Christian Brothers. Two members of the practice squad, tight end Cole Hikutini and DeAndre Carter, also have Sacramento connections. Hikutini is from Elk Grove; Carter played at Sacramento State.
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Reaser was a fifth-round pick in 2014. Like several of former general manager Trent Baalke’s selections, he entered the league with an ACL injury that delayed his start with the team.
Jackson is the 32nd player on San Francisco’s 53-man roster who was not with the team last year.