Not morphed in the computer manipulation sense, but an effect of using a wide angle (short focal length) when you are close to the subject.
They did this a lot with Hulk Hogan. His biceps looked like bowling balls in the publicity closeups, but in the long shots while in the ring, while certainly big, they are not nearly so....large.
Interesting.. and his relative small potato head is also creating this illusion, same as with Flex Wheeler, Victor Martinez, Phil Heath & Big Ramy