Calling up Berrios late in 2015 would not have burned a year of control, compared to what actually happened. He would be in the same state as he is now in that regard, except +30 days or whatever for service time (meaning we'd have to keep him down until August instead of July this year to get an extra year of control, assuming 2016 played out exactly the same). Also, he would not have exceeded any innings limit if they took a few steps to manage it that August. And while he may have failed in 2015 too, I would have rather taken that chance in a pennant race than turn to Graham and O'Rourke in key relief spots vs RHB. (Although it should be noted that Berrios remains untested in relief, it is unclear if he would have struggled in that role like he did in a starting role in 2016. In any case, it would have been fairly easy to gauge in a few low leverage outings to begin his career.)