Mets manager Terry Collins was "sick to my stomach" when he saw Daniel Murphy limping around shallow center field after injuring his left knee on Sunday.

It was clear to Collins that Murphy was in intense pain.

"All he was saying was, 'Get me off the field,'" Collins said. "That’s all he kept saying was, 'Get me off the field. Get me off the field.'"

Murphy will apparently be off the field for the remainder of 2011.

A source told ESPNNewYork.com's Adam Rubin that Murphy suffered a Grade 2 tear of the medial collateral ligament in his left knee and is done for the season. Murphy will not require surgery, but will have a four-month recovery time. The team will call up Triple-A shortstop Ruben Tejada to replace Murphy on the roster.

Murphy left Sunday's game against the Braves after Jose Constanza’s spike drove into the lower portion of his leg, causing his knee to bend unnaturally.

An X-ray taken after the game revealed no fractures. Murphy went for an MRI at the Hospital of Special Surgery in Manhattan to more accurately determine the extent of the injury.

“I think Murph is certainly going to be disabled,” Mets GM Sandy Alderson said.

Murphy, in at second base in the top of the seventh after entering the game as a pinch-hitter in the sixth, covered the bag on Constanza's steal attempt.

Constanza's spike drove into the lower portion of Murphy's left leg after Murphy applied a late tag. Murphy immediately hobbled into right-center and was tended to by Mets training staff. He was helped off the field by trainers Ray Ramirez and Mike Herbst. It appeared that he could not put any weight on his left leg.

Murphy tore his right MCL last June while in Triple-A Buffalo and missed the remainder of the year.

It now appears that the Mets will again be without one of their hottest bats.

Murphy is hitting .320, fifth in the National League. He singled and drove in a run in his pinch-hit appearance in the sixth. Murphy has hit safely in 12 of his past 13 games. His 28 doubles tied him for the fifth-most in the NL.

Jose Reyes also left Sunday’s game, in the second inning due to a mild pull in his left hamstring. Last month, Reyes strained his left hamstring and missed 16 days.

The Mets have been crippled by injuries this season, with Reyes, David Wright and Ike Davis missing significant time due to injury. Starter Chris Young is out for the season with a shoulder injury and Johan Santana has yet to return from shoulder surgery that was completed last Sept. 14.