David Robertson and Yanks Agree on 5.21

Both Robertson who just signed and Nova who hasn't yet, should have gotten multi-year deals.  Hopefully, this 5.21 deal is just to get past arbitration and they can work on a multi-year pact going forward.  They cannot want him to hit free agency.  Same is probably true of Nova, though DRob is a more proven quantity.   Nova should be next.