According to Matt Barrows of the Sacramento Bee, rookie tackle Trent Brown and linebacker Aaron Lynch have been activated off of the team's NFI (non-football injury) list and will practice with the team tomorrow.
That leaves center Daniel Kilgore and wide receiver DeAndre Smelter as the only 49ers not cleared to practice.
Tomorrow's practice will be at Levi's Stadium in front of fans following the Charlie Wedemeyer All-Star Charity High School Football Game.
Brown was selected by the 49ers in the seventh round of this year's draft. Lynch was selected by the 49ers in the fifth round of the 2014 draft.