OAKLAND, Calif. -- The Oakland A's kicked off the second half of the season with a powerful statement and an emotional 8-7 comeback victory over the Toronto Blue Jays on Friday night at Oakland Coliseum.

Josh Reddick, Khris Davis and Stephen Vogt -- the A's second, third and fourth hitters in the lineup -- each homered and played starring roles in the comeback.

"It was a huge game for us in a lot of ways," Vogt said. "A lot of emotion tonight and a lot of fire from our dugout. It's a great way to kick off the second half."

Davis hit a two-run blast in the fifth inning, his 20th homer of the season. Vogt followed with a solo shot, his eighth home run. Reddick hit his sixth home run of the season, a solo blast, in the third.

Davis went 3-for-4, drove in three runs and scored once, and Vogt went 3-for-4 with three RBIs and scored twice. Reddick went 2-for-2 with an RBI, walked twice and scored four runs, including the game-winner.

The A's snapped a 7-7 tie with a run in the seventh but needed a video review and an overturned call to grab an 8-7 lead.

Reddick walked with two outs and moved to second on Davis' single. Vogt then lined a single, but center fielder Kevin Pillar threw a strike to catcher Russell Martin, and home plate umpire Mark Wegner called a sliding Reddick out in a close play.

A's manager Bob Melvin, as well as first baseman Yonder Alonso, had been ejected by Wegner in the bottom of the fourth for arguing a called third strike, but bench coach Mark Kotsay challenged the out call on Reddick. After a review of 2:56, the call was overturned and Reddick was ruled safe.

"I thought I got in pretty good, but I'm not the guy that's going to look back in the dugout and do the headset movement because I don't want to be the guy that (says) for sure safe and they don't overturn it," Reddick said. "I knew I was safe. I was coming back and telling them I thought I got in."

Blue Jays manager John Gibbons said the call "could have gone either" way on the play.

"You knew it was going to be close," Gibbons said. "You never really know. It was a hell of a throw by (Pillar) to make it close. Judgment call."

A's rookie right-hander Daniel Mengden gave up seven runs (six earned) and six hits in 3 1/3 innings. He struck out two, walked three and threw two wild pitches in a no-decision.

Oakland relievers Liam Hendriks, John Axford, Marc Rzeczynski, Ryan Dull and Ryan Madson combined to blank Toronto in the final 5 2/3 innings. Madson pitched a perfect ninth for his 18th save of the season. Dull (3-2) pitched a scoreless 1 2/3 innings for the win.

Blue Jays right-hander Marcus Stroman allowed seven runs (six earned) and nine hits, including three home runs, in 4 2/3 innings. He struck out five and walked one in a no-decision.

"Early in the game he was ball-one on everybody," Gibbons said. "You've got to get ahead, and then it looked like a lot of balls in the middle of the plate."

Brett Cecil (0-6) allowed a run in the seventh and took the loss.

Melvin and Alonso were ejected by home in the fourth after Alonso struck out looking. Alonso started arguing and was quickly tossed out of the game as Melvin raced out of the dugout. Melvin got the hook seconds later.

"We just thought we were getting the short end on the low pitches," Melvin said.

The A's scored five of their eight runs after Melvin and Alonso were thrown out.

"That definitely woke everyone up from the break," Madson said.

Jed Lowrie singled with one out in the second inning, moved to second on Reddick's walk and scored on Davis' single to center, giving Oakland a 1-0 lead. Reddick scored when Vogt grounded out to make it 2-0.

Toronto cut Oakland's lead to 2-1 in the second and scored two more runs in the third. Devon Travis led off with a single, and Mengden issued back-to-back walks with one out to load the bases. Mengden uncorked a run-scoring wild pitch, and Michael Saunders hit a sacrifice fly.

Oakland answered with a run in bottom of the third on Reddick's home run to center with two outs.

"Red got us going," Vogt said. "That's one of the biggest ones I've seen him hit. That fired us up."

Toronto, however, scored four times in the fourth to take a 7-3 lead.

"You score seven runs, you should win," Gibbons said.

NOTES: Oakland recalled 3B/1B Ryon Healy from Triple-A Nashville and optioned OF Billy Burns to the Sounds. Healy made his major league debut and started at third Friday in place of UTIL Danny Valencia, who will see more time at first base, designated hitter and left field. ... A's OF Jake Smolinski started in center field and is expected to get the majority of playing time there in place of Coco Crisp, A's manager Bob Melvin said. Crisp served as the DH on Friday. ... A's LHP Rich Hill (blister on left middle finger) missed his scheduled start Friday, but he threw before the game and will start Sunday against Toronto, Melvin said. ... Toronto RHP Marco Estrada (sore back) will be activated from the disabled list and return to the rotation July 22 when the Blue Jays host Seattle, manager John Gibbons said. ... Blue Jays OF Jose Bautista (hyper-extended big toe, left foot) still has no target date for his return, but Gibbons said he's hitting off a tee and making progress.