O'Brien, KC, of Abington, formerly of Brockton and Marshfield, Jan. 22, at the age of 30. Beloved son of Gary O'Brien of Largo, FL and Lynn Porter of Brockton, dear brother of Chuck O'Brien of Brockton, Crystal Grzyboski of Brockton and Kellie O'Brien of Hingham. Loving grandson of Mary C. O'Brien of Safety Harbor, Fl. Nephew of Kathleen O'Leary of Cohasset, Maureen O'Brien of Safety Harbor, FL and Stephen O'Brien of Quincy. Beloved Godfather and uncle of Lacey Mae O'Brien. Also survived by his love Leigh Anne. KC was born in Boston, graduated from Marshfield High School, class of l996. He was an employee of Star Market. Visiting hours at the MacDonald Funeral Home, l755 Ocean St., rte. l39, Marshfield Tuesday from 3 to 6 p.m. A Funeral service will be held at 6 p.m. at the funeral home.