Which player was nicknamed "J-Rod"?

What position did Randy Johnson primarily play? What position did Julio Rodríguez primarily play? Julio Rodríguez is best known for playing with which MLB team? What uniform number did Julio Rodríguez wear with the Mariners? What position did Nolan Ryan primarily play? What position did Iván Rodríguez primarily play? Iván Rodríguez is best known for playing with which MLB team? What uniform number did Iván Rodríguez wear with the Rangers?