I've seen a lot of talk about Strasburg and his innings limit lately, and I think I may have come up with a solution that will allow for him to pitch into mid September without skipping any starts or going to a 6-man rotation. The only roster change would be an additional arm in the pen.
Strasburg has one start left before the break against the Rockies, I'm going to assume he pitches 6 innings leaving him with 99 IP for the 1st half. Using Zimmermann's IP coming off of TJ as a reference point, I'll assume that his limit will be in the 160 to165 IP range. What I suggest the Nationals do is have Strasburg be the 5th starter in the 2nd half of the season, while also limiting him to 5 IP a start, allowing for him to get 12 or 13 starts and have his final start be on either September 12th against the Mets, or September 19th against the Dodgers, this would also allow the Nationals to only need to use a spot starter (Lannan, Maya, etc) 2 to 3 times at the end of the year.
I'm sure a big concern will be the bullpen being overworked.. but this is where the extra arm being added to the pen comes in hand. With the addition of Storen, Kimball, H-Rod (still useful when up or down big to throw and inning or two) as well as one more arm from AAA such as Maya or Lannan the bullpen should be perfectly capable of handling the slightly increased workload.