Washington Nationals ace Max Scherzer left Friday night’s game against the San Francisco Giants after getting just one out.

Scherzer threw 12 pitches before the training staff came out. He then threw just one warm-up pitch in front of the training staff and proceeded to walk off the field in frustration.

Here’s how it looked:

It’s unclear what the injury is, but it at least doesn’t appear to be arm-related.

Still- any Scherzer injury is a huge deal to Max and the Nationals.

That’s especially the case with the current timing. Scherzer is an upcoming free agent, and he’s a potential massive trade chip for the Nationals (who entered Friday 25-33, in last place in the NL East at seven games back).

So, both sides really, really hope that Scherzer won’t have to miss any time and can keep producing like the ace he is.

The three-time Cy Young winner — who turns 37 on July 27; or, three days before the trade deadline — has been fantastic this season, with a 2.21 ERA in 77 1/3 innings pitched.

UPDATE: According to Jessica Camerato of MLB.Com, Scherzer “felt a groin tweak.” However, the MRI only showed inflammation, and Scherzer is considered day-to-day at the moment.

About Matt Clapp

Matt is an editor at The Comeback. He attended Colorado State University, wishes he was Saved by the Bell's Zack Morris, and idolizes Larry David. And loves pizza and dogs because obviously.

He can be followed on Twitter at @Matt2Clapp (also @TheBlogfines for Cubs/MLB tweets and @DaBearNecess for Bears/NFL tweets), and can be reached by email at mclapp@thecomeback.com.