While it would be nice for Sale to get some rest, I have no problem with Farrell leaving Sale in the game.
1. Sale didn't have any high stress innings.
2. He was not laboring. He still looked strong at the end of the game.
3. He already gets an extra day off with today's off day.
4. After his last couple of starts, letting him stay in and have a dominating outing, while earning his 300th K, has to be a boost to him mentally.
5. There is no way Sale would have wanted to come out of that game.