New York City FC sporting director David Lee tends to keep a low profile during the transfer window, but major acquisitions by other clubs might force him to act By now, fans of New York City FC should be accustomed to how the cub functions in the transfer market: Silent, confident, a little distant. For the most part, you don’t hear about a trade until the deal has been signed, notarized, and ready to be presented to the public. Sporting director David Lee runs a tight ship. That understated professionalism is the only thing that sets NYCFC apart from other…