Who is The Rock's trainer for Royal Rumble?

The Rock is back to wrestle in the Royal Rumble against CM Punk, and he is training for this highly-anticipated match with Michael McGuillicutty. This is what The Rock tweeted about his training:

One of my favorite ring training partners: @wwe 3rd generation beast Joe Hennig. #TalentedToughAndHumble twitter.com/TheRock/status…

— Dwayne Johnson (@TheRock) January 25, 2013

 

Hopefully, The Rock is able to shrug off all the difficulties that he will face while wrestling and is able to deliver the best for the Royal Rumble. He will experience a lot of stiffness, which he is most likely overcome.