The Brief Zavi Gonzalez aims to become the first player in the MLB with a prosthetic leg. He plays with a prosthetic leg. "I want people to look at my and say, 'Dang, he's playing with that, and he's that good,'" Gonzalez said. He has used a prosthetic leg ever since. "I want to be the first player in the MLB with a prosthetic," Gonzalez said.