CHICAGO (AP) – John Jay’s RBI double in the 10th inning lifted St. Louis over the Chicago Cubs 5-4 on Saturday, bolstering the Cardinals’ bid for another playoff appearance.  Carlos Beltran hit a tying solo homer in the ninth for the Cardinals, who began the day with a two-game lead over Los Angeles for the second NL wild-card spot. Milwaukee dropped 2 1/2 games behind. The defending World Series champion Cardinals have 10 games left in the regular season.  After Matt Carpenter and Brian Anderson drew two-out walks from Jaye Champan (0-1), Jay doubled down the right-field line.  Mitchell Boggs (4-1) got one out in the ninth. Jason Motte struck out the side in the 10th for his 39th save.  Beltran made it 4-all with his 30th homer, a one-out shot off Carlos Marmol.