Interesting report about Spencer Howard from Jim Peyton at phuturephillies:
After waiting several days since skipping Spencer Howard’s scheduled start on April 30th, the Threshers have placed him on the 7-day injured list. Interesting to note that the placement is not retroactive to any earlier date.
In other words, whatever the issue is with Howard, the Phillies didn't bother to make his IL assignment retroactive - which means they don't expect him to be available for at least another week. So whatever it is, it's not trivial.