The Mets may have gained that momentum back with a come-from-behind extra inning victory on Tuesday night.
After getting the first two outs in the bottom of the 10th, the wheels came off for Braves reliever Jeff Bennett.
Jose Reyes reached first on an infield single and promptly stole second, putting the potential winning run in scoring position.
Bennett then intentionally walked Alex Cora. Ramon Castro, pinch hitting for Fransisco Rodriguez, also drew a walk.
Carlos Beltran stepped to the plate with a chance to win the game as Jose Reyes stood on third base, grinning from ear to ear.
Beltran ran the count full and Bennett missed low with a fastball to walk in the winning run.
Rodriguez pitched the ninth and tenth innings to pick up his first win of the season. It was K-Rod's first regular season outing longer than one inning since August 17, 2007.
The Mets trailed 3-0 before they finally got on the board in the eighth inning. After singles from Jeremy Reed and Ryan Church, Reyes knocked a Jair Jurrjens pitch into the gap in left.
Reed and Church scored, but Reyes was erased trying to stretch a double into a triple. Bad baserunning mistake by Reyes here. He represented the tying run and should have stayed put at second with one out.
New York rallied again in the ninth off Atlanta closer Mike Gonzalez.
Beltran led off the inning with a double, his seventh of the season.
David Wright failed to move Beltran over to third as he popped out to first baseman Casey Kotchman in foul territory.
Beltran took matters into his own hands and stole third. Beltran's fourth steal of the year was probably the biggest play of the game.
After Fernando Tatis was hit by a pitch, Luis Castillo came through with a pinch hit sacrifice fly to tie the game.
Lost in the late-inning drama was a solid performance by starting pitcher Mike Pelfrey.
Pelfrey went seven innings, allowing two runs on six hits and one walk.
Big Pelf could not get through the sixth inning in his first four starts, but has now pitched seven innings in his last two starts.
With his 2-4 game, Beltran raised his batting average to .374 and climbed back into a tie for the NL lead with Cincinnati first baseman Joey Votto.
The Mets and Braves will play at 1:10 on Wednesday in the rubber game of the series. New York will send rookie southpaw Jonathan Niese (0-0, 3.00 ERA) to the hill to face Atlanta's Jo-Jo Reyes (0-2, 5.48).
Niese had the best outing of his very brief major league career against Atlanta last September. The 22-year-old did not allow a single run while striking out seven in eight innings of work.