It was the first time a game ended using a video review.
Pinch-hitter Matt Diaz tied it with a two-run homer off Leo Nunez (4-3) after Brooks Conrad led off the ninth with a walk. Nunez retired the next two hitters, then McCann drove a 1-2 pitch toward the wall in right.
The ball bounced back onto the field, and the umpires initially ruled it was still in play. McCann stopped at second and began arguing that he should have more than a double.
The umpires conferred, then headed toward the Florida dugout to look at a replay which clearly showed the ball struck the top of the wall — right over McCann’s name on an auxiliary scoreboard — and went over. It ricocheted back onto the field off a back wall.
Crew chief Tim McClelland returned to the field, pointed toward McCann with a slight grin — and gave the universal signal for homer. The review took a relatively quick 1 minute, 26 seconds.
Most of the Braves players were already on the field, ready to celebrate while the umpires looked at the replay.   When McClelland twirled his right index finger, McCann finished his triumphant jog around the bases, slamming down his helmet before he touched home and disappeared into the arms of his teammates.
In Cincinnati, Kosuke Fukudome’s homer tied it in the top of the eighth, but his throwing error in the bottom half of the inning helped Cincinnati rally for a win that completed the Reds’ season-long domination of the Chicago Cubs.
The Reds took a five-game lead in the NL Central, their biggest edge since early in the 2002 season, when second-place St. Louis lost to Washington 4-2.
Cincinnati won 12 of its 16 games against Chicago this season, its best showing since going 12-5 in 2002. The NL Central leaders have won 11 of their last 15 games overall.
Fukudome’s two-run homer off Arthur Rhodes tied it at 5. His throw from right field skipped into a photographers’ booth behind third base in the bottom of the inning, letting in the go-ahead run off Sean Marshall (6-5).
In San Diego, Cole Hamels shut down his hometown Padres on four singles in eight innings to win for the first time in nine starts, leading the Philadelphia Phillies to a three-game sweep of bumbling NL West-leading San Diego.
The Padres have lost four straight games for the first time this season and were swept for just the second time. The Padres, who led the majors in fielding percentage (.989) coming in, committed a season-high four errors.
After being swept at home in four games by Houston, the wild card-leading Phillies had their usual success at Petco Park. They won their seventh straight game at the downtown ballpark, where they’re 18-4 since it opened in 2004.
In Washington, Adam Wainwright struggled for five innings and the St. Louis Cardinals lost again, falling to Washington and dropping five games behind Cincinnati in the NL Central.
Wainwright (17-9) failed in his third bid to become the NL’s first 18-game winner. The Nationals tagged him for four runs on six hits and three walks in five innings.
In his last three starts, Wainwright’s ERA has increased from a league-leading 1.99 to 2.30.
John Lannan (6-6) drove in two early runs, then pitched shutout ball into the seventh inning to leave the Cardinals at 2-5 — all against last-place teams — on their 10-game road trip.
Drew Storen got the final four outs for his third save, despite allowing Pedro Feliz’s ninth-inning solo homer.
In San Francisco, Jose Guillen hit a go-ahead, two-run single in the seventh inning and the San Francisco Giants beat the Arizona Diamondbacks.
Freddy Sanchez added three hits and two RBIs for the Giants, who avoided being swept by the last-place Diamondbacks and pulled within five games of San Diego in the NL West.
In Milwaukee, Trevor Hoffman earned his 599th career save and Ryan Braun homered as the Milwaukee Brewers completed a three-game sweep of the Pittsburgh Pirates.
The all-time saves leader entered the game with one out in the ninth and two runners on base, and retired both batters he faced to convert his eighth save in 13 chances this year. The right-hander lost his closer’s job to John Axford earlier in the season, but manager Ken Macha in recent weeks has allowed him to close games with leads of three runs or more in an effort to get him to 600 saves.
The Brewers roughed up Pittsburgh starter Charlie Morton (1-10) for eight runs in just 3 1-3 innings on a day where, for the first time, the retractable roof at Miller Park was positioned in an effort to diminish the shadows on the field.
In Denver, Dexter Fowler hit two triples to set a Colorado record and had three RBIs, Carlos Gonzalez homered twice and drove in four runs and the Rockies beat Los Angeles for their first series win over the Dodgers in two years.
Jason Hammel (9-7) hung on for his first win in four starts since Aug. 6. Fowler has 12 triples this year, the most in a season by a Rockies player.
Dodgers pinch-hitter Manny Ramirez argued a called first-pitch strike and was ejected in the sixth inning.
Ted Lilly (8-9) yielded seven runs in four innings, including five with two out in the fourth.
In New York, R.A. Dickey flustered the Astros with knuckleballs and foiled them with his bat, leading the New York Mets over Houston.
Josh Thole homered and Dickey (9-5) keyed a second-inning rally with a two-run single that helped the Mets end a four-game winning streak by Bud Norris (6-8).