The slumping Brandon Nimmo laced the tie-breaking two-out RBI single in the seventh inning Sunday afternoon for the host New York Mets, who completed a four-game sweep of the St. Louis Cardinals with a 7-4 win.The Mets squandered a 3-0 lead before rallying back. They improve to 15-7 — tied for the third-best 22-game start in franchise history. The four-game sweep of the Cardinals was the first since 1986, when New York won its most recent championship.The four-game losing streak ties a season-high for the Cardinals, who were outscored 19-9 by New York in the series.Nimmo, mired in a 3-for-23 slump, fell into a 1-2 hole against former teammate Phil Maton before he singled past diving shortstop Thomas Saggese to score Francisco Lindor from second.The Mets added key insurance in the eighth, when Tyrone Taylor had an RBI bloop double before Juan Soto delivered a two-run double.Soto finished with three RBIs, while Lindor was 3-for-5 with a leadoff homer. Pete Alonso had a run-scoring single in the fifth. Soto, Taylor and Luisangel Acuna had two hits apiece.