Mark Vientos saw to it that the Mets best starting pitching performance of the season meant something Sunday. The Mets had floundered offensively for most of the afternoon, but Vientos with one 11th-inning jolt offered absolution, delivering a two-run walk-off homer in a 4-2 victory at Citi Field that prevented a Cardinals three-game sweep. Its almost like a dj vu moment, said Vientos, who was swarmed by teammates at home plate and received a dousing. I feel like I have lived that moment over and over in my head, so it was just like, Let it go. Let all the energy out. Mark Vientos celebrates his walk-off home run against the Cardinals. AP Mark Vientos celebrates his 11th inning home run to give the Mets the win on Sunday. Bill Kostroun/New York Post The Mets, down to their last strike, tied it 2-2 on Harrison Baders RBI single (the teams first hit of the game in 16 at-bats with runners in scoring position). Vientos who arrived Saturday when Starling Marte was placed on the bereavement list cleared the fence in right-center against Matthew Liberatore to end it. Vientos entered the game in the ninth inning as a pinch hitter for Brett Baty and singled. Mets shortstop Francisco Lindor (12) celebrates after hitting a solo home run in the sixth inning against the St. Louis Cardinals on Sunday. Wendell Cruz-USA TODAY Sports He fell behind 0-2 in the count in the 11th before blasting a sinker on the sixth pitch of his at-bat. I thought it could have been caught, Vientos said. But then I saw the exit velo on the board [105.8 mph] and was like, Maybe its going to go. I know their center fielder plays a little deep, so I was iffy a little bit Chris Wideman Jersey . Vientos competed for a job with the Mets in spring training, but was ultimately optioned to Triple-A Syracuse, with Baty receiving the third-base job and the path to DH at-bats blocked by J.D. Martinezs arrival late in camp. Pete Alonso (20) and DJ Stewart (29) dump Gatorade on Mark Vientos after his walk-off homer on Sunday. Bill Kostroun/New York Post But the Mets saw flashes of the 24-year-old Vientos power in limited sample sizes over the previous two seasons. As the game progre sed, knowing where they were bullpen-wise I told him to be ready because they have got a couple of lefties, manager Carlos Mendoza said. He was ready to go, so its a credit to him and its good to see. Mendoza was asked about Vientos chances of remaining in the major leagues beyond Martes return to the club on Tuesday. Well see, Mendoza said. But I am pretty sure he will be in the lineup [Monday]. Vientos wasnt interested in discu sing the future. Im enjoying this moment right now, we just won, and I am focused on that, Vientos said. Explore More Jose Quintana had the best outing by a Mets starting pitcher this season, limiting the Cardinals to one earned run on three hits with three strikeouts and one walk over eight innings. No other Mets starting pitcher has worked even into the seventh this season. The length and quality was needed by the Mets, who received subpar starts from Jose Butto and Adrian Houser in the first two games of this series. Mets pitcher Jose Quintana delivers the ball in the first inning on Sunday. Bill Kostroun/New York Post Highlight-reel catches by Brendan Donovan in left field robbed the Mets of hits in the second, third and fourth innings. In the second, Tyrone Taylors shot at 111 mph was snagged by the diving Donovan in medium left field. The next inning Donovan dived on the warning track to deprive Tomas Nido of an extra-base hit. In the fourth, Taylor hit a shot to the left-center gap that Donovan caught on the run to conclude the inning. Mark Vientos hits a walk-off homer on Sunday. Bill Kostroun/New York Post Michael Sianis squeeze bunt in the fifth pushed acro s Masyn Winn with the games first run. Winn doubled leading off the inning and advanced on a ground out before Sianis bunt. Baty mishandled the bunt, allowing Siani to reach first but he was left stranded at third after stealing second. Francisco Lindors homer leading off the bottom of the sixth tied it 1-1. The blast was Lindors fourth in his last nine games and occurred amid a 1-for-10 skid in this series. Lindor jumped on a full-count sinker from Lance Lynn and cleared the fence in left-center. The scoring ceased until the 11th inning, when Reed Garrett, in his second inning of relief, surrendered a go-ahead single to Donovan. Edwin Diaz had helped keep the game at 1-1 with a perfect ninth. It was a great win because there was a lot going on during that game, Mendoza said. Xavier Simoneau Jersey