Report: Yanks In "Serious Pursuit" Of Andrew Miller

The stove has been ice cold in Yankeeland for the last few weeks, but this report by Buster Olney may have just turned the gas back on.  Andrew Miller was one of the best relief pitchers in baseball this past season, better than D-Rob in some respects, and he's been drawing a lot more attention on the FA market than Robertson.  I think I read something earlier in the offseason about 20+ teams showing interest in him, and all that reported interest is sure to push him into the 4-year contract territory.

That's the territory the Yankees seemingly don't want to enter with D-Rob, so I'm curious as to why they're willing to go there with Miller.  They really can't go wrong with either Miller or D-Rob, and I would be a big fan of them adding both, but I really don't understand the thinking here.  I guess saving a few bucks on a guy who's not a "proven closer" gives them more money to spend on the infield?  I don't know.  I've just about given up trying to figure out what their strategy is this offseason.