The Pittsburgh Steelers have activated tight end-fullback David Johnson from the physically unable to perform list.

Johnson was sidelined for all of last season with a torn anterior cruciate ligament in his right knee.

Now, he's back.

The Steelers need depth with Heath Miller still on the physically unable to perform list and Matt Spaeth having an injured foot.

Follow me on Twitter: @RavensInsider

Aaron Wilson covers the Ravens for The Baltimore Sun.