There's two things that are about to happen that really affect how teams manage injuries. Understanding them may help you figure out what's going on around your favorite team or help you juggle things with your fantasy team when there's injuries to big-name players like Matt Harvey, Matt Kemp and Clay Buchholz.
First, the minor league season is drawing to a close. That means, unless a team has an affiliate who made the playoffs, the chance for a player to go on a rehab assignment is about to go away. For rehab, players will now have to play in simulated games at the team's complex. It's not the same; though some teams do it better than others. For players like Ryan Howard, this could be key.
Second, the DL itself is about to go away. It doesn't actually go anywhere, but with the expansion of rosters, the DL becomes pointless, and most teams cease using it. The DL is about roster space, not injury management.
If a player is injured in August, he goes on the DL so his replacement can be brought in. In September, an injured player is just shuffled aside, and his replacement is already there. This makes calculating DL days very difficult.
It gives some players and teams and advantage, but it also throws off the patterns you might be used to. Be sure that this new way of doing business in September helps your team as it pushes to a championship!
Now, on to the injuries: