NEW YORK -- Edwin Jackson threw six strong innings to earn his second straight win and David DeJesus had a three-run triple in the second inning Friday night before exiting with a shoulder injury in the Chicago Cubs' 6-3 win over the New York Mets in front of 32,208 at Citi Field.
DeJesus left in the bottom of the third with a right shoulder injury suffered when he crashed into the wall in pursuit of a triple by Juan Lagares, the Mets centerfielder who just missed corralling DeJesus' triple. DeJesus underwent X-rays at Citi Field shortly thereafter but results weren't available during the game.
The Cubs (27-38) won their second straight -- the first time they have won back-to-back games since a season-high five-game winning streak from May 26-31-- as they improved to 4-8 in June. The Mets (24-38) fell to 1-5 on their eight-game homestand.
Jackson, who struggled during the first two months after signing a four-year, $52 million contract in January, improved to 3-8 after allowing one run on six hits and three walks while striking out seven. He has given up one earned run in each of his last two starts, a stretch of 13 innings in which he's lowered his ERA from 6.29 to 5.23.
Nate Schierholtz homered in the first inning -- his fourth homer in his last eight starts -- to give the Cubs a lead they'd never relinquish.
Anthony Rizzo had three hits. Dioner Navarro had two hits and Darwin Barney and Luis Valbuena each had an RBI.
James Russell allowed two runs in the seventh before Carlos Marmol threw a perfect eighth and Kevin Gregg earned his eighth save with a 1-2-3 ninth.
Daniel Murphy had a pair of RBI singles and David Wright reached base in all four plate appearances (three singles and a walk) for the Mets, who left eight runners on base and stranded a pair of runners in the third, fourth and fifth innings.
Shaun Marcum fell to 0-8 - tied for the third-worst start in Mets history - after allowing six runs on seven hits and one walk with four strikeouts in 5 2/3 innings.
Marcum retired 12 in a row after DeJesus' triple, which just eluded Lagares' grasp and capped a four-run second. He threw 82 pitches, 23 fewer than he threw in his eight-inning relief stint Saturday in the Mets' 2-1, 20-inning loss to the Marlins.
The Cubs raced out to a 5-0 lead via Schierholtz's homer in the first and four runs in the second, when they opened the inning with two singles and a walk off Marcum. Barney followed with an RBI single, and after Jackson struck out, DeJesus cleared the bases with a triple off the glove of Lagares in deep centerfield.
Lagares helped put the Mets on the board in the third with his triple to almost the exact same spot. DeJesus crashed into the wall so hard while chasing the ball that his glove popped off.
DeJesus immediately began writhing in pain and every Cubs player on the field except Jackson and catcher Navarro raced out to him, along with manager Dale Sveum and trainer P.J. Mainville. After several minutes on the ground, DeJesus walked off the field mostly under his own power, though his right arm was slung over the shoulder of Mainville.
The Mets almost stranded Lagares at third, but after consecutive infield popouts, Murphy brought Lagares home with a single.
NOTES: Mets manager Terry Collins said before the game that Zack Wheeler, the club's top prospect, will start the second game of Tuesday's day-night doubleheader against the Braves in Atlanta. Wheeler will be making his major league debut and Collins said he wanted Wheeler to be on a more normal routine, as opposed to having him start the 1 p.m. game. Matt Harvey will start the early game for the Mets. ... LHP Johan Santana, who is out for the year after undergoing surgery to repair a tear in his left shoulder capsule, visited the Mets before the game. It was the second shoulder capsule tear and surgery for Santana, but Collins said Santana feels better now than he did at the same point in his rehab from the first surgery and that he wants to pitch again. ... The Cubs activated RHP Henry Rodriguez, whom they acquired from the Washington Nationals on Tuesday, and optioned LHP Brooks Raley to Triple-A Iowa. ... Navarro and Mets counterpart John Buck had an amusing moment in the fourth when Navarro lost track of Marlon Byrd's popup. Navarro covered his head as the ball bounced off a wall right behind an unknowing Buck, who was in the on-deck circle. Buck gave the ball to a fan.