His parents say he can go by his middle name when he's old enough to decide. For now, the newborn will be known by his first name: Wrigley. And his last name: Fields. His parents are Paul and Teri Fields of Michigan City, Ind. They are -- no surprise -- fans of the Cubs, who have played at Wrigley Field since 1916. The Fields planned the name for years before their son's birth. Wrigley Alexander Fields was born Sept. 12 at an Indiana hospital.