The mercury in Atlanta reached almost 120 degrees on the field, so it's easy to understand why the native of temperate San Diego was affected by it.
Before being replaced by Chien-Ming Wang, Strasburg had labored through his three frames -- three runs on two hits and four walks, just 36 of 67 pitches for strikes -- and he had also spent an inordinate amount of time running the bases, as he was 1-for-1 with a walk at the plate. Strasburg was visibly uncomfortable on the mound during a long home half of the third.
In the Nationals' dugout between innings, Strasburg seemed displeased with the decision before he was escorted up the tunnel by the team trainer.
The abbreviated outing raised his 2012 ERA from 2.60 to 2.81.