A's rookie Jarrod Parker hurled seven innings of one-run ball to outduel an effective Dan Haren and hand the Angels a 3-1 defeat that snapped their six-game winning streak.

Each day, MLB.com selects one player from each game whose performance stands out.

Buster Posey went 2-for-5 with a two-run homer and Hunter Pence added a solo shot, but a pair of errors cost the Giants in Monday's series opener at Coors Field.

It took 5 hours and 22 minutes over 14 innings before the Reds finally claimed a 4-3 victory over the Pirates on Ryan Ludwick's two-out infield single.

Recalled from Triple-A Iowa on Sept. 1 when rosters expanded, Dave Sappelt came through in the clutch for the Cubs on Monday at Minute Maid Park, driving in three runs and scoring another in the Cubs' 4-1 victory over the Astros.

Seeing lower-than-normal velocity and erratic control, the Reds had concerns about closer Aroldis Chapman during Monday's 4-3 win over the Pirates in 14 innings.

Jarrod Parker allowed one run over seven innings as the A's won their 10th straight road game with a 3-1 victory over the AL West rival Angels in the opener of a four-game series.

Rick Porcello cruised through the first five innings, but he was unable to work around an error in the sixth and gave up four runs on back-to-back homers as the Tigers dropped a 6-1 decision to the White Sox on Monday night. Detroit trails Chicago by three games in the AL Central.

Alex White set the tone with four solid innings and his first career homer and veteran relievers Matt Belisle and Rafael Betancourt finished it as the Rockies outlasted the Giants, 6-5, on Monday night.

The matchup between the A's and Angels on Tuesday night in Anaheim carries major playoff implications, yet both clubs will be sending fill-in starting pitchers to the mound due to injuries.

Kevin Correia, who is filling in for an injured Jeff Karstens, could help his case to stay in the rotation with a strong outing against the Reds and Mike Leake at Great American Ball Park on Tuesday, trying to even the series at one.

A recent surge has placed the Brewers squarely in contention for one of the two National League Wild Card spots — one of which is currently in the Braves' hands — with 21 games to play.

Alex Rios hit a three-run homer and A.J. Pierzynski followed with a solo shot as the White Sox ended a seven-game losing streak to the second-place Tigers with a 6-1 victory on Monday night. With the win, Chicago increased its AL Central to three games.

In the series opener in Arlington, Matt Harrison — 15-9 with a 3.37 ERA in his second full season in the Rangers' rotation — will be opposed by Ubaldo Jimenez, who is 9-15 with a 5.58 ERA in his first full season with the Indians.

Justin Germano, who has lost his past four starts, hopes Tuesday's outing in Houston goes as well as his previous one against the Astros on Aug. 15 — the last time he notched a victory. Houston will counter with right-hander Jordan Lyles.

Back on their home turf only to be shut down by the Braves through six innings on Monday, the Brewers scored four runs in the seventh and won, 4-1.

Will Smith hasn't had much luck against the Twins this season. In two starts, the Kansas City lefty has lost both contests, a trend he'll be looking to reverse when he starts Tuesday's series opener at Target Field, opposing Scott Diamond.