Smith landed on the 10-day injured list with right shoulder inflammation Saturday, Justin Toscano of The Bergen Record reports.
Smith has pitched well in 41.1 innings for the Mets this season, cruising to a 2.40 ERA and 1.06 WHIP, though he owes at least some of his success to an unsustainable .212 BABIP. It's not yet clear how much time he'll miss.