Mets' Chris Flexen: Undergoes knee surgery

Flexen underwent knee surgery to repair a torn meniscus, Betsy Helfand of the Las Vegas Review Journal reports.

Flexen was placed on the minor-league disabled list earlier in the month, and this essentially ends his season. The 24-year-old posted a 4.40 ERA and 1.52 WHIP across 92 innings with Triple-A Las Vegas before going under the knife. He also made four appearances for the big club, though he struggled to a 12.79 ERA and 3.16 WHIP over those outings.