The Mets recently placed ace Jacob deGrom on the injured list because of some elbow discomfort. Obviously, anything involving a pitcher's elbow is immediately disconcerting, but the Mets and deGrom appear to have dodged major injury this time: 

Mets GM Brodie Van Wagenen provided reporters with more details about deGrom's MRI:

DeGrom, who turns 31 in June, has been solid this season: 

Jacob deGrom
TEX • SP • #48
2019
ERA3.68
WHIP1.27
IP22.0
BB7
K36
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Of course, he's coming off a tremendous 2018 campaign, in which he pitched to a 1.70 ERA in 32 starts, put up a WAR of 9.6, and was a near-unanimous choice for the NL Cy Young Award. Because of that demonstrated upside, deGrom and the Mets not long ago agreed to a $137.5 million contract extension. 

The Mets under first-year GM Brodie Van Wagenen are all-in on contending in the tough NL East this season, and they'll need deGrom to perform at a high level while remaining healthy. That this turned out to be fairly minor elbow malady is obviously a good thing, but nothing predicts future injury like recent injury. In that sense, you can consider deGrom's durability to be an early 2019 sub-plot.