The New York Mets received troubling news on Monday when an MRI scan determined pitcher Noah Syndergaard has a partial tear in his right lat muscle.
He has been placed on the 10-day disabled list and there is no timetable for his return.
Syndergaard was forced to leave Sunday's 23-5 thrashing at the hands of the Washington Nationals in the second inning due to the injury.
He had been pushed back from a scheduled start on Thursday due to what the team described as biceps tendinitis, but refused to get an MRI after that setback.
While timeframes for a return vary, Mets team-mate Steven Matz missed two months with a torn lat muscle in 2015.
Syndergaard, 24, is 1-2 so far this season with a 3.29 ERA and 32 strikeouts in 27 1/3 innings pitched.