The New York Mets lost a key member of their rotation for the stretch run, as right-hander Carlos Carrasco was diagnosed with a left oblique strain, the team announced Tuesday.

While an MRI revealed the injury is a low-grade strain, Carrasco could be sidelined for three-to-four weeks.

Carrasco lasted just two innings against the Atlanta Braves on Monday before departing with what the team initially called left side tightness.