Complex sentence: Wanting to become a professional wrestler, Reeves began lifting weights at 12 years old, and he was nicknamed "Silverback" as a teenager after a childhood friend joked that he resembled a gorilla, and later adopted it as a part of his ring name.
Split into simpler sentences: Wanting to become a professional wrestler, Reeves began lifting weights at 12 years old. He was nicknamed "Silverback" as a teenager, after a childhood friend joked that he resembled a gorilla, and later adopted it as a part of his ring name.