There is just no way Mauer was going to be catching a lot of games in, say, 2017. No chance whatsoever, even if he had zero concussion issues.If anything, this helps the Twins to rebuild by opening up the catcher spot, where hopefully they can find a solution. It was a miracle Mauer played catcher as long and as often as he did.The Twins are lengthening Mauer's career in exchange for a modest (1-1.5 WAR) short-term dropoff, while they stink anyway. It's just not a negative in any meaningful sense.