OAKLAND, Calif. -- Josh Donaldson would be the first to tell anyone how difficult it is to hit the ball out of the O.co Coliseum.

Apparently, however, he hasn't had time to warn his new teammates.

Russell Martin smacked a three-run homer and Edwin Encarnacion and Jose Bautista added solo blasts Tuesday night, sending the Toronto Blue Jays to a 7-1 victory over the Oakland Athletics in the teams' first meeting since their blockbuster trade in November.

Donaldson, the Blue Jays' lone acquisition in the five-player deal, added two doubles and an RBI in his return to Oakland as Toronto roughed up former teammate Kendall Graveman and three relievers.

"That's rare," Blue Jays manager John Gibbons said of the three-homer game in Oakland, where a total of just 69 home runs were hit in the Athletics' first 47 home dates. "You don't see a lot of home runs here at night, but that's what we do."

A's manager Bob Melvin said of Graveman, "I thought he was keeping the ball down early on. Even some of the home runs they hit, they went down and got them. The numbers will show, they're the best offensive team in the American League, in all of baseball."

Third baseman Brett Lawrie, sent to Oakland along with Graveman and two minor-leaguers, recorded two of the Athletics' eight hits, a pair of singles, in his first game against his old mates.

Left-hander Mark Buehrle improved to 11-5, including 6-1 since May 23, with seven innings of one-run ball. He has never allowed more than three runs in seven career starts against Oakland, going 5-1 over that stretch.

Buehrle allowed eight hits and struck out three. He did not walk a batter while holding a ninth consecutive opponent to two runs or fewer, an all-time Blue Jays record.

"I let them put the ball in play and rely on my defense," the veteran said with a shrug when told of the achievement. "I wouldn't think I'd ever accomplish that."

In the opener of a six-game trip, the Blue Jays were clinging to a 2-0 lead before knocking out Graveman with a four-run sixth. Martin's home run, his 13th of the season, provided the crushing blow, following walks to Encarnacion and first baseman Justin Smoak.

Bautista homered earlier in the inning.

"The guys did a good job of putting up runs, and Buehrle pitched a great game," said Donaldson, Toronto's All-Star third baseman. "That's a good win."

For a while, it was being accomplished without much help from the returning hero, who received a standing ovation before his first at-bat. He struck out into a double play during an 0-for-3 start and committed the game's only error on an errant throw.

"There's been a lot of games where I've been 0-for-3 and had an error," Donaldson said. "Part of what makes me what I am is I'm not going to stop. With failure comes success.

"Today I had my teammates doing their thing. That made it easier for me."

The A's ended Buehrle's shutout bid on left fielder Jake Smolinski's RBI triple in the bottom of the sixth to get within 6-1. However, Donaldson's first double, which plated shortstop Jose Reyes, got that run back in the top of the seventh against Oakland reliever Dan Otero.

Martin, Donaldson, Reyes and center fielder Kevin Pillar had two hits apiece for Toronto, which lost its previous four games in Oakland. The Blue Jays out-hit the A's 10-8.

Graveman (6-6) lost his second consecutive decision. He was lit up for six runs on six hits, including the three homers, in 5 1/3 innings. He walked three and struck out four.

The six runs allowed were the most Graveman permitted in a game since April 25.

"I didn't execute the plan going in," the rookie said. "I just didn't make good pitches. I have to continue to learn from failure."

Lawrie and center fielder Billy Burns had two hits apiece for Oakland, which fell to a major-league-worst 6-18 against left-handed starting pitchers.

Encarnacion's homer, a solo blast halfway up the first deck of bleachers in left field, opened the scoring in the second inning. It was his 19th of the season.

Pillar's first hit of the night, a leadoff double in the third, led to Toronto's second run. He scored on Reyes' one-out RBI single.

Bautista's homer made it 3-0 in the sixth. It was his 20th, giving him 20 or more in six consecutive seasons, allowing him to join Carlos Delgado and Joe Carter as the only Blue Jays to accomplish the feat.

NOTES: Blue Jays DH Edwin Encarnacion has eight home runs in just 17 games against the American League West this season. ... RF Jose Bautista hit his 223rd home run as a Blue Jay, tying him with OF Vernon Wells for second place on the franchise's all-time list behind 1B Carlos Delgado (336). ... A's CF Coco Crisp (cervical strain) took live batting practice before the game for the first time since going on the disabled list May 20. ... Oakland RHP/LHP Pat Venditte (strained right shoulder) will make rehab appearances for Class A Stockton on Thursday (throwing with both arms) and Saturday (left-handed only). ... Blue Jays RHP Aaron Sanchez (strained right lat) allowed two unearned runs in two-thirds of an inning in a rehab appearance for Triple-A Buffalo on Tuesday. Toronto plans to convert Sanchez to a reliever upon his return, which tentatively is set for the series finale Thursday.