Why do the Yanks have a throwaway game?

It seems like they always have a toss away game where halfway thru they bring in their third or fourth string pitcher when they’re still in the game. You have Cessa and others in pen, but you bring in a Nelson, who proceeds to give up go ahead runs making it more difficult for us to catch up. Don’t know why they’re enamored with Nick Nelson? The guy doesn’t impress me much.