Mets Lose Game and Another Shortstop Al Bello/Getty Images Infielder Justin Turner injured his right ankle after being picked off at first base in the third inning. For the Mets, the past week had been among their best of the season, featuring back-to-back shutout performances by Johan Santana and R. A. Dickey and a string of five victories in six games. But a sunny, hot Memorial Day turned ominous for the Mets. They lost to the Philadelphia Phillies, 8-4, on Monday at Citi Field, and one of the team's sparkplugs, the utility infielder Justin Turner, sprained his right ankle and will probably be sidelined for weeks. The Mets have struggled to keep their shortstops healthy. The starting shortstop, Ruben Tejada, strained a quadriceps while running to first base and went on the disabled list three weeks ago. Tejada's replacement, Ronny Cedeno, injured his calf while batting and left a game after hobbling to first base. He is still not ready to return, so Turner, who has played every position in the infield this season, replaced him Monday. Turner's injury occurred in the bottom of the third inning when he was caught in a rundown between first and second base. As Phillies second baseman Jimmy Rollins chased him back to first and applied the tag, Turner appeared to pull up, as his foot hit the base. He went sprawling and lay on his back for about five minutes in obvious pain Turner's injury came as the Mets started a stretch against tough opponents including the Phillies and the Washington Nationals, who lead the National League East. After Turner left the game, third baseman David Wright slid over to shortstop for the second time in his major league career. He played two innings in one game last year. The Mets called up shortstop Omar Quintanilla and pitcher Chris Schwinden from Class AAA Buffalo and said they would be ready for Tuesday's game. The Mets, even after losing Monday, remained ahead of the Phillies on Memorial Day in the N.L. East for the first time since 2007. But the game exposed some of the team's weaknesses, both in pitching and hitting. Jon Niese had another inconsistent start in which he struggled with control, eventually leaving in the sixth after giving up four earned runs and the Mets trailing, 4-2. Niese gave up only two hits but walked five. "I didn't have good stuff," he said. I didn't have good control. However, the Mets evened the score at 4-4 in the sixth on a two-run homer by Scott Hairston. A two-run homer by Vinny Rottino had made it 2-2 in the fifth. In the seventh, reliever Bobby Parnell gave up a run on a single by the former Met Ty Wigginton, putting the Phillies ahead, 5-4. Still, the game was in reach until Manny Acosta came on in the ninth. After yielding two singles, Acosta gave up a three-run homer to Wigginton, who drove in six runs over all. Acosta has given up 33 runs in 22 innings of relief this season. Collins said he was concerned with Acosta's performance and planned to speak with him later Monday. The Phillies" Cole Hamels pitched eight strong innings and improved his record to 8-1. He is tied for the most wins in the National League. Turner's injury happened in the third with two out and catcher Rob Johnson on second. Turner singled to right field and made the turn toward second, apparently expecting that Johnson would try to score. But Johnson was held up at third by coach Tim Teufel. Phillies catcher Brian Schneider threw behind Turner, starting the rundown. Trapped, Turner, tried to extend the rundown to try to give Johnson a chance to break for the plate, but he stayed at third. Pitcher Miguel Batista, who was placed on the disabled list May 20 after leaving a game with lower back stiffness, is scheduled to make a rehabilitation start Tuesday with the Met's Class AA team in Binghamton. If all goes well, he could return to the Mets on Sunday. Catcher Josh Thole, who is recovering from a concussion, caught five innings in an extended spring training game, and shortstop Ruben Tejada and outfielder Jason Bay hit in that game.