Massie received slight wounds on 25 June, and 20 July, he was seriously injured on the night of 6–7 August 1915, during the Battle of Lone Pine by shrapnel. The cricketer had been sent by a junior officer to investigate an outpost which was under fire, and was struck by an exploding shell. The shrapnel lodged into the back of his left shoulder and he also suffered a punctured lung and broken ribs. The injury was serious enough for him to be repatriated to Australia, he was promoted to captain during the journey, on 1 December.