Johnson played three of the Ravens' 59 snaps on offense in Monday's 41-31 win over the Buccaneers.
Coach John Harbaugh said Wednesday that Johnson will suit up for Friday's preseason opener against the Eagles but that top quarterback Lamar Jackson won't play, Jonas Shaffer of TheBaltimoreBanner.com reports.
The Ravens are re-signing Johnson to a one-year contract Thursday.
Johnson (coach's decision) is inactive for Saturday's tilt against the Texans.
Johnson was released by the Ravens on Saturday.
Coach John Harbaugh indicated Saturday that Johnson is slated to start and play the first half of Monday's preseason game against the Commanders, Jamison Hensley of ESPN.com reports.
Johnson (concussion) is signing a contract with the Ravens on Monday, Adam Schefter of ESPN reports.
Johnson will likely remain the 49ers' backup quarterback for Thursday's game against the Seahawks with Brock Purdy (oblique/ribs) listed as questionable but expected to start, Adam Schefter of ESPN reports.
The 49ers signed Johnson off the Broncos' practice squad Tuesday.
The 49ers plan to sign Johnson to their 53-man roster, Adam Schefter of ESPN reports.