The Pittsburgh Steelers are experimenting with remote controlled robotic tackling dummies in practice.

The dummies could aid in tackling development without the risk of players hitting each other.

"The applications we are quickly finding are endless," Mike Tomlin told the team's official website. "It never gets tired. It runs at an appropriate football speed. All of the position groups are getting an opportunity to use it. It's funny, you just put it on the field and watch the guys and they show you the applications. It's been fun watching that."

While still in the testing phase, the robot can mimic many football moves, cuts and has been clocked at a five second 40 yard dash time. The video displays the dummies being used for tackling, chase drills, as well as placeholders for defenders in passing practice.

"I imagine it's a great tool from a tackling tech standpoint," Tomlin added. "In today's NFL, with player safety the focus that it is, I think it's going to provide opportunities to improve in that area without the hand to hand or man to man combat associated with that teaching."

James Harrison announced he will continue his NFL career in 2016.

Harrison had been contemplating retirement because he wasn't sure his body could take another NFL season.

"I'll be 38 on Wednesday and I'm feeling just like a fine wine. Getting better with age," Harrison wrote on Instagram.

The Pittsburgh Steelers have re-signed Bruce Gradkowski to a one-year deal.

Gradkowski will compete with Landry Jones for the role of backup behind Ben Roethlisberger.

Gradkowski, 33, has not started an NFL game since 2010.