Manager Terry Collins said Sunday that deGrom is likely to miss several starts with the soreness in his forearm, Anthony DiComo of MLB.com reports.
The original hope was that deGrom would only miss his next start, but the injury appears to be more significant. Rafael Montero is starting for deGrom on Tuesday and could remain in the rotation. That might change if Steven Matz (shoulder) is able to return, allowing Seth Lugo and Robert Gselllman to fill the two open rotation spots.