Flexen will be called up to start Sunday against the Rays, Tim Healey of Newsday reports.

EDGE Analysis

Despite an off day Thursday, the Mets need a fifth starter with a doubleheader coming up on Monday. Flexen has allowed eight runs (four earned) in 3.1 innings of relief for the Mets this season and has a mediocre 4.84 ERA in 67 innings for Triple-A Las Vegas.