Nope. That's not how the rule works. Because the Steelers punted it and imparted "impetus" to the ball, the Patriots are able to recover it in the endzone for a touchback as long as they don't provide their own "impetus", which they didn't. If the Steelers recover it, it's a TD. There is no safety on the play either way..As soon as he touched it (Pats player) it's a live ball. It ended up in the endzone, he recovered, was tackled, safety.