Wow. I'm all for monitoring pitcher workload and not just going "I once saw Simon "Dirt Road" Charleston* throw a 200-pitch outing for the Brooklyn Dodgers to get the complete game win, then pitch the first game of the playoffs 3 days later while hungover and he had a perfect game." because that's stupid and you damn well should be preventing guys from blowing their arms out for overuse, but that was an insanely quick hook on Smyly. If he's so injured that you're not even going to think twice about yanking him at, what, 70 pitches? Then maybe he shouldn't be pitching at all in the bigs yet.
*not a real player. Don't bother looking it up