The Rock is a confident and charismatic fighter who knows how to entertain the crowd. He is a man of action, who always backs up his words with his actions. He has a quick wit and a sharp tongue, but also has a softer side and is known for his charitable work.

For voice reference, just look up any video with him talking. Here is an example.
The Rock Rapping
(Please record various grunts for attacks, being hit, and death)