Cubs 6, Cardinals 3 (11): Welington Castillo belted a three-run homer with two outs in the top of the 11th inning as Chicago prevailed after blowing a lead in the ninth.

Castillo drilled a 1-1 pitch well into the left-center seats off Trevor Rosenthal (0-1), who batted with two runners aboard and struck out to end the 10th. Justin Grimm (1-0) survived a pair of leadoff walks in the 10th to earn the victory while Hector Rondon worked around a two-out walk in the 11th to record his first career save.

Nate Schierholtz led off the 11th with a double among his four hits and drove in a run, while Ryan Sweeney added two hits and an RBI for Chicago. Matt Carpenter delivered the game-tying sacrifice fly in the ninth, Yadier Molina recorded two hits and his team-leading eighth RBI, and Matt Adams added two hits for St. Louis.

Jose Veras entered in the ninth trying to earn his first save in a Cubs uniform, but hit two batters, walked a pair and allowed a single as St. Louis tied the game 3-3. Molina, who led off with a single, scored on a passed ball and three batters later, Carpenter delivered a sacrifice fly with the bases loaded.

The Cubs took a 3-1 lead in the eighth when pinch hitter Justin Ruggiano led off with a single and moved to second on Emilio Bonifacio's sacrifice. Pinch hitter Mike Olt singled before Ruggiano scored on Anthony Rizzo's sacrifice fly, and Schierholtz's bloop single to left got past a diving Matt Holliday, allowing Olt to score from first.

GAME NOTEBOOK: Chicago's Jeff Samardzija yielded one run and six hits in seven innings while receiving his first run support in three starts while Joe Kelly allowed an unearned run and six hits in six innings - lowering his ERA to 0.79 - for St. Louis. ... Samardzija has pitched seven innings in each of his three outings. ... Molina has 42 RBIs - the most by any player against the Cubs since 2011.