Mets' Grant Hartwig: Tears meniscus, out 6-8 weeks

Hartwig underwent surgery Friday to repair a torn meniscus in his left knee and will be out six-to-eight weeks, Tim Healey of Newsday reports.

Hartwig made four appearances for the Mets this season but has spent most of his time at Triple-A Syracuse, where he's logged a 2.31 ERA across 23.1 innings. He'll be sidelined until at least August.