CHICAGO (AP) -- With the Chicago Cubs at the top of the NL Central, the Wrigley Field faithful have been some of the loudest fans in baseball. Jeremy Hermida managed to quiet them with one swing of the bat.
Hermida hit a pinch-hit home run to lead off the ninth inning, helping the Florida Marlins to a 3-2 win over the Cubs on Friday.
Hermida came in for catcher Paul Hoover, who had struck out his first three times up, and launched a Bob Howry pitch over the right field wall to put Florida ahead. The announced crowd of 41,570 at the friendly confines was silenced, as Chicago dropped to 38-13 at home.
"To quiet those fans takes a lot," Hermida said. "It's a fun place to play all around. Real passionate fans and they back their players better than any fans around. It was fun to go out there and do something like that and quiet them down."
Hermida, who has come off the bench in each of the last two games, snapped an 0-for-9 slump with his 13th homer of the season.
The Marlins finished with only six hits Friday, but still improved to 4-4 since the All-Star break.
Chicago's Jeff Samardzija, the former Notre Dame football star, made his major league debut after being called up from Triple-A Iowa before the game.
Samardzija came in to protect a 2-1 lead in the seventh, but couldn't hold it.
His second inning went smoother, as he retired the side in order. He ended up allowing one run and two hits with two strikeouts in two innings.
"I felt really good coming out for that second inning. My mechanics came together a little more," Samardzija said. "My whole goal here was to go out and throw well and give confidence to the coaches that they can throw me out there in any situation."
Samardzija received a standing ovation -- his first of many -- when he took the mound, and the crowd cheered when he struck out pinch-hitter Alfredo Amezaga to lead off the seventh.
While he showed some wildness -- badly missing Soto on a pitch out -- he also displayed a fastball that was clocked at 99 mph on the stadium radar gun.
Cubs starter Ryan Dempster tired during a hot day at Wrigley.
Dempster allowed two hits and struck out six, but walked a season-high six in six innings. In the fifth, Dempster got the first two men out before walking the bases loaded. He then struck out Uggla to get out of the jam.
Florida starter Josh Johnson also tired in his third start of the season after undergoing elbow surgery on Aug. 3.
Johnson overpowered the Cubs early, striking out four of the first five batters before Soto hit his 17th home run of the season in the second inning.
Johnson matched a career high with eight strikeouts in 5 1/3 innings. He gave up two runs and seven hits with three walks.
"He wasn't as sharp as we've seen him before, but this is I think his third start and he gave us all he had and he battled," Marlins manager Fredi Gonzalez said.
Reed Johnson homered in the fifth to break a 1-all tie. The Cubs were in position to score more in the inning with Alfonso Soriano on second and Ryan Theriot on first, but Soriano was thrown out at the plate by Willingham on a Derrek Lee single to left field to end the inning.
The Cubs, who lead the NL with 538 runs, left 11 runners on base Friday, and have been very inconsistent lately. They've scored 25 runs in their last three wins, but only eight in their last six losses.
"This seems to be one of those times when we're getting ourselves in good position to score runs, but we're just not cashing in," said Johnson, who had two of Chicago's 10 hits. "But, we'll be fine."
Luis Gonzalez doubled in the first inning, but was then walked by Dempster his next two times up. Gonzalez is 11-for-19 (.579) lifetime against Dempster. ... Ryan Theriot had two hits Friday, and leads the NL with 41 multihit games. ... Samardzija is taking the roster spot of closer RHP Kerry Wood, who was placed on the disabled list Thursday, retroactive to July 14, with a blister on his right index finger.