LOS ANGELES -- The New York Mets plan to place infielder Wilmer Flores on the disabled list with a left hamstring injury before Thursday's series finale against the Los Angeles Dodgers. They will promote left-hander Sean Gilmartin from Triple-A Las Vegas.

Flores hurt the hamstring in Monday's series opener and tried to play through it on Tuesday.

He will fly to New York and is due to be examined by team doctors on Thursday to learn the severity of the injury.

"It's definitely frustrating, but what are you going to do?" said Flores, who is hitting .180 with one homer and two RBIs in 50 at-bats.

The Mets need an extra pitcher because Steven Matz will remain active while dealing with left forearm soreness. Logan Verrett is expected to take Matz's start on Saturday at Colorado.