ST. LOUIS (AP) — R.A. Dickey became the first pitcher in the majors to win 18 games this season, and Ike Davis hit a three-run homer to lift the New York Mets to a 6-2 victory over the St. Louis Cardinals on Wednesday. The knuckleballer allowed two runs in 6 2-3 innings en route to his 18th win, the first Mets pitcher to reach the mark since Frank Viola (20-12) and Dwight Gooden (19-7) both did it in 1990. Dickey (18-4) gave up eight hits and struck out five to help New York salvage a win to close out the three-game series. Davis gave the Mets a 5-1 lead with his 26th homer, and Daniel Murphy went 3-for-4 to lift his average in day games to an NL-best .351 (65 for 185). Josh Thole and Andres Torres had RBI singles, and Lucas Duda drove in the Mets’ other run with a bases-loaded walk. The Mets did most of their damage off of Cardinals starter Adam Wainwright (13-12), who allowed five runs and eight hits in five innings.