We visit with Mark Carpenter who's been a longtime ring maker for WWE. I saw WrestleMania III last year and he was the one created those carts for the wrestlers which were made to resemble a wrestling ring. Then they found some other work for him especially for WWE's ring.
He created the rings and then made changes to the steel cages for WWE and now he has a regular job with them. He's the one who created the stage - err the ring - for the performers. You see in this video that he's working on a ring with a heating system that will keep the dynamics of the ring as if it's indoors. See at this year's WrestleMania which will be in at MetLife Stadium in East Rutherford, New Jersey, WWE Superstars will be performing out doors. That means they do need a ring that functions like the superstars are performing indoors and I would imagine the weather of New Jersey in early April won't quite be that warm.