“Playing hurt” is always a tough call. First off, few players are 100 percent physically during much of an MLB season. So most everyone plays at some level below 100 percent at points during a season. Then, It’s often really hard to know when someone is hurt, or just sore from the grind. If hurt, how hurt? Will they make it worse by playing? You might decide that 90 percent of a given player is better than 100 percent of his replacement. You might need that replacement player at another position anyway, because he’s subbing for someone in worse shape, so the guy at 90 percent HAS to play. It’s not as simple as “Don’t play Dozier with a sore knee.” Obviously there’s a point where you should DL him, but often these situations aren’t as black and white as we like to imagine them. Players have to play, or they’re worthless. And replacements don’t grow on trees, nor are they usually good as the player they are replacing.