I would be surprised if Ross is Lester's personal catcher regardless of splits. Would imagine Montero is catching for Lester opening day. Think it would send a very bad message if Lester insists on Ross despite the fact that Montero is excellent defensively and was targeted as our number one catcher. Obviously the front office places great emphasis on pitch framing, and it's easy to see why, based on all the studies that have been popping up - Maddon has been talking about it at least for the last 3-4 years, so this isn't some new passing fad. According to the stats in the article posted by davell, if we had Montero catching instead of Castillo last year, teams would have scored 7% less runs against us on the season. Don't know how to quantify heightened pitch counts, etc, but would imagine there is very significant value there as well. No way Castillo's offensive upside comes close to covering that gap, and would imagine that this run differential more than justifies the salary differential between the two players. Once we got Montero, Castillo's value as trade bait to a team less smitten with pitch framing stuff is most likely worth more than his value catching every 5th day for the cubs. And we've got a great defensive tandem with good splits to for the next few years as we wait to see whether Schwarber is for real.