Stephen Strasburg left Saturday's start because of tightness in his left side and will be evaluated Sunday, Nationals radio broadcaster Charlie Slowes reports.

Strasburg left Saturday's start because of tightness in his left side and will be evaluated Sunday, Nationals radio broadcaster Charlie Slowes reports.

Analysis:

The "left side" could mean a variety of things, but it seems likeliest that Strasburg suffered an oblique injury. Considering the issues he's already had this year, it wouldn't be surprising if the Nationals shut Strasburg down through the All-Star break, but we'll find out more once doctors get a look at him Sunday.