Police and an agent for 25-year-old Erica Blasberg say the LPGA Tour golfer has died. California native Erica Blasberg turned pro in 2004 after a successful college career at University of Arizona.Hunter Martin Henderson police spokesman Keith Paul said Monday that authorities were investigating Blasberg's Sunday death. It was not immediately clear whether foul play was involved. Blasberg's agent, Chase Callahan, confirmed her death but declined to provide details because of the investigation. A message left with the coroner's office was not immediately returned.