Syndergaard left Friday's game with arm fatigue and the Mets specified that it is "not elbow-related," MLB.com's Anthony DiComo reports.
Of course, Syndergaard still has bone spurs in his elbow, so it's not as if his elbow is 100 percent fine. The velocity on his fastball was down in the 91-94 mph range before exiting, so something was clearly wrong. Syndergaard gave up three runs on four hits and three walks while striking out five in 4.2 innings against the Nationals prior to leaving Friday's game. He will now obviously not pitch in the All-Star game, and it is unclear if he will need to be skipped in the rotation after the All-Star break. Matt Harvey (shoulder) was ruled out for the season earlier Friday, so this has been a brutal day for the Mets' rotation.