Johnson had a workout with the Colts on Monday, Aaron Wilson of KPRC 2 Houston reports.

The 49ers placed Johnson (knee) on their practice squad injured reserve list Tuesday, per the team's official site.

Johnson suffered a season-ending torn ACL in Sunday's win over the Buccaneers, Adam Schefter of ESPN reports.

Johnson didn't return to Sunday's game against the Buccaneers due to a knee injury, Nick Wagoner of ESPN.com reports.

The 49ers elevated Johnson (rib) from the practice squad Saturday, Nick Wagoner of ESPN.com reports.

The 49ers released Johnson (ribs) on Tuesday.

Johnson (rib) left the game in the fourth quarter of the 49ers' 28-21 win over the Packers Friday, David Lombardi of The Athletic reports.

Johnson signed a one-year contract with San Francisco on Thursday.

Johnson was activated off of the reserve/COVID-19 list Saturday.

Johnson (illness) was placed on the reserve/COVID-19 list Monday, as a result of testing positive for the virus, Tom Pelissero of NFL Network reports.