The 49ers placed Jackson on the reserve/PUP list with a knee injury Thursday, Field Yates of ESPN reports.

EDGE Analysis

Jackson missed the final 12 games of last season, including playoffs, due to a knee injury. The 2022 second-round pick out of USC opened training camp on the active/PUP list, and his move to the reserve/PUP list could lead to him missing at least the first four games of the regular season. Jackson played in 23 regular-season games over the last two campaigns, accumulating 21 tackles (12 solo), including 6.0 sacks, along with nine passes defended and one interception.