My explanation is that the front office has a self-imposed discipline, and they stuck to it. Had Berrios not thrown a relative clunker on April 19 in suburban Atlanta, he might have been up sooner. Two straight high-quality AAA starts afterward must not have been their metric, but the next one was. Management always preaches "consistency", and two in a row doesn't cut it. That's my reverse-engineering solution to the puzzle. I always prefer to try that, than to conclude "their idots".