The Mets have put infielder Ronny Cedeno on the 15-day disabled list because of a strain on the left side of his chest and promoted right-hander Jeremy Hefner from Triple-A Buffalo.

The moves were made before Monday’s doubleheader against San Francisco. Cedeno’s move was made retroactive to Saturday.

Cedeno is hitting .250 in 10 games.

Hefner, 26, is 2-1 with 1.96 ERA for Buffalo. He has not pitched in the major leagues.