NEW YORK — Baseball labour negotiations are set to resume Tuesday, just over two weeks before the scheduled start of a spring training that’s threatened by a lockout. The sport’s ninth work stoppage began Dec. 2 after the expiration of a five-year labour contract, and the sides did not meet again on the central economic issues until Jan. 24, when players withdrew their proposal for more liberalized free agency. Management responded the following day by withdrawing its proposal for more limited salary arbitration. Clubs also accepted the union’s framework to funnel additional money to pre-arbitration-eligible players from central revenue, offering a $10 million pool based on awards and WAR. The union has asked for $105 million for the group, usually about 30 players annually. Tuesday’s session will be the first on the central issues since then, and the sides don’t agree on many economic proposals, leaving very little time to end the lockout and avoid disrupting the Feb. 16 schedule...