Rapid Reaction: Cardinals 6, Cubs 3

CHICAGO — The St. Louis Cardinals rallied Saturday against the Chicago Cubs' bullpen to score a 6-3 victory at Wrigley Field. A quick look:

How it happened: For the fourth game in a row, the Cubs found themselves trailing before their first at-bats. The Cardinals jumped out to a 2-0 lead in the first on Matt Adams' two-run double with one out. Starter Jake Arrieta calmed down quickly, tossing six solid innings, striking out six and walking one while allowing just the two runs. After the Cubs cut the lead in half when Emilio Bonifacio scored on an Anthony Rizzo groundout in the fourth, Nate Schierholtz, pinch hitting for Arrieta, tied the game at 2 with a solo home run in the bottom of the sixth. The Cardinals took back the lead with four runs in the seventh, highlighted by a two-run triple by Adams, against the Cubs' weary bullpen.

What it means: With the Cubs bullpen being taxed over the previous few days, Arrieta's ability to bounce back from a rough first inning and go six strong was much needed. It wasn't, however, enough to cover up the fact that nearly every arm in the pen has been used more than manager Rick Renteria would like over the past week -- and the Cardinals certainly capitalized. The recently called-up Blake Parker certainly appeared fresh, tossing two perfect innings and striking out four of the six batters he faced. Look for more movement of bullpen arms between Triple-A Iowa and Wrigley in the coming weeks.

Outside the box: A.J. Pierzynski made his Cardinals debut Saturday and received a mixed welcome -- cheers from the large Cardinals contingent at Wrigley slightly outdone by the boos from the Cubs faithful. The former White Sox catcher had the last laugh, collecting three singles and an RBI in his four at-bats.

Up next: The Cubs wrap up their three-game set with the Cardinals as rookie Kyle Hendricks gets his first taste of the division rivalry, facing St. Louis ace Adam Wainwright in the 1:20 p.m. CT start.