At a keynote speech I attended, Terry Ryan once stated that he could think of many ballplayers who would hit .400, if MLB was played one game per week. I took that to mean not only that the 162-game season is a grind, but some players are ground down worse than others. He wasn't saying everyone would hit .400, because conversely the pitchers would be better rested too. The grind is what levels down the competition, in other words. (He wouldn't name names, of course, but I distinctly remember thinking the implication included Delmon.) So I'm unwilling to second guess the manager too much on the choice of whom to rest, and when. There's a very good chance you could wring a little bit better performance out of a team with less rest, but also an increased chance of decreased performance, and there's no way to forecast which is which. Also, apart from judgement, or analytics, the manager has access to info concerning the physical state of the players, that I never will.