One thing on Nats' wish list: Lefty reliever

WASHINGTON -- The Nationals have already completed much of their heaviest shopping this winter -- with the exception of a potential reunion with Bryce Harper -- upgrading at catcher, revamping their rotation, finding a new second baseman, reconnecting with their old backup first baseman and adding a pair of righties in the bullpen.

It leaves little on the Nationals' wish list before they head to West Palm Beach, Fla., three weeks from Wednesday and gives them a chance to focus on a few minor tweaks to their roster, areas like starting pitching depth or adding veterans to come to camp and compete for roster spots. But as the Nats begin polishing off their offseason, one area they may need to…