After the second inning of today’s game in Atlanta, Stephen Strasburg left the game with some sort of injury. He did not seem to be in pain, and no injury was obvious. He was shown on TV in the dugout, protesting his removal to Davey Johnson.

May 16, 2013; San Diego, CA, USA; Washington Nationals starting pitcher(37) against the San Diego Padres at Petco Park. Mandatory Credit: Christopher Hanewinckel-USA TODAY Sports

Strasburg had allowed one run through two innings at the time of his removal from the game. He appeared to start grimacing after striking out Evan Gattis on a curveball, and his fastball velocity fell a few miles per hour against Dan Uggla.

We will update you as information is available.

EDIT: CSN Washington is describing it as a “shoulder ailment”. We don’t know yet whether they have a source.

9:19 PM: Now Adam Kilgore reports from a source that Strasburg had a problem with a muscle in his back, and not with his arm as some feared.

Meanwhile, Craig Stammen threw four perfect innings in relief to play savior for the Nats.

10:03 PM: Julie Alexandria of MASN is saying Strasburg felt a twinge in his back before the game, tried to pitch through it, and it got worse to the point where he could not continue.

11:30 PM: The official word is a strained oblique, which is unfortunately the same injury Ross Detwiler has.