The Marlins couldn't help the Braves clinch a National League East title on Friday, but Atlanta can take matters into its own hands on Saturday at Wrigley Field.
The Braves decreased their magic number to one with a 9-5 win over the Cubs in Friday's series opener. They hung around to see if the Marlins could beat the Nationals later that night, but Washington delayed the celebration with a blowout victory.
On Saturday, the Braves hope they won't have to wait in order to pop some champagne. If they take care of business on the field, they will claim their first division championship since 2005.
Atlanta, which also leads the race for home-field advantage throughout the playoffs, will send Kris Medlen (14-12, 3.32 ERA) to the mound at Wrigley Field.
Medlen, who has won eight of his past 10 starts, dominated in his last outing. The right-hander used all three of his pitches with success in 7 1/3 shutout innings for his fourth straight win.
"I think tonight more than even the past few, I established all three pitches early," Medlen said after the game. "I knew I was going to have to establish all three, and usually it takes a couple innings to kind of get the curveball going, but everything felt really good from the get-go, and I just mixed pitches pretty nicely."
Meanwhile, left-hander Travis Wood gets the nod for the Cubs in what will be his first career start against the Braves.
Wood (9-11, 3.05 ERA) tossed his 23rd quality start of the season his last time out against the Pirates but took a no-decision. In that game, he allowed two runs on five hits in six innings.
"For me, it goes back to last year when they wanted me to work both sides of the plate, arm side and glove side, and I really focused on arm side, because I was predominantly glove side," Wood said about his approach this season. "For me to take that into this year and make sure I can command both sides of the plate and prepare as best as I can, side sessions and everything, it's been outstanding."
The left-hander hasn't fared too well at home this season, compiling a 4-8 record with a 3.53 ERA in 17 starts.
Braves: Heyward returns from DL
• Atlanta activated outfielder Jason Heyward from the disabled list on Friday. He started in center field and hit in the leadoff spot.
Heyward's return comes just four weeks after his jaw was fractured by Mets left-hander Jon Niese on a fastball up in the zone. He will wear a protective guard on his batting helmet for the remainder of the season.
"It's good to be ready," Heyward said. "I've been working hard to get back in shape as soon as possible."
Heyward finished Friday's game 0-for-2 with a walk and a run scored.
Cubs: Castillo out for season
• Welington Castillo has a partial meniscus tear in his right knee and will need arthroscopic surgery.
The Cubs catcher will now miss the rest of the season. The injury will take four to six weeks to rehab following the surgery.
Castillo, who had an MRI on Friday, exited Thursday's 5-1 victory over the Brewers in the sixth inning after running out a ground ball.
"With proper rehab, it's the type of thing you come back 100 percent from with rehab," Cubs president of baseball operations Theo Epstein said.
• Cubs outfielder Junior Lake leads all Major League rookies with 67 hits since the All-Star break.
• The Braves have been shut out 15 times this season, marking the second-highest total in the Majors, behind Miami with 17 shutouts.
Quinn Robertsis a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.