NEW YORK (Reuters) The New York Mets will place infielder Daniel Murphy on the disabled list and could be without All Star Jose Reyes after both players were injured on Sunday, continuing a season of hard-luck injuries for the team.

The Mets confirmed that Murphy, hitting .320 this season, will be sidelined after he sustained a serious left knee injury in the seventh inning of their 6-5 loss to the Atlanta Braves.

Murphy was playing at second base when Atlanta's Jose Constanza slid into his leg while attempting to steal, sending the New York infielder to the ground before he was helped off the field.

After missing all of last season with injuries to his right knee, Murphy could have his 2011 campaign cut short by the latest injury.

National League batting leader Reyes, hitting .336, hurt his left hamstring while running to first base in what appears to be the same injury that sidelined him for 12 games last month.

The extent of Reyes injury is not yet known and both players will undergo further tests.

"It's always tough to lose teammates especially a catalyst like Reyes, and Daniel's been having a great year," New York's Willie Harris told the team's website (newyork.mets.mlb.com).

"It's just one of those things where you have to pick up one another."

Injuries are nothing new for the Mets (56-57), who have also had David Wright and Ike Davis miss significant game time while pitchers Chris Young and Johan Santana have also been sidelined this season.

(Writing by Jahmal Corner in Los Angeles; Editing by Greg Stutchbury; To comment on this story email sportsfeedback@thomsonreuters.com)