CHICAGO -- J.A. Happ looked and felt like his old self again -- the left-handed ace who went 20-4 last season for the Toronto Blue Jays.

Happ struck out a season-high 10 through seven innings to win for the first time in nearly a month, Josh Donaldson homered for the third straight game and the Blue Jays defeated the Chicago White Sox 5-1 on Wednesday afternoon.

"I felt more like myself maybe from last year today in terms of being able to use a lot of pitches for strikes -- and I think that was a big part of it," Happ said. "I felt like we were using everything and throwing everything for strikes.

"The main thing is trying to get back to a point where I'm trying to get deep in games and consistently giving us a chance to win the ballgame."

Happ (4-8) allowed one run, scattered six hits and walked one as he matched his longest outing this season, which came in a 3-1 loss on April 5 at Baltimore. The lefty was 0-3 in his previous four starts, but was sharp on Wednesday.

"(He was) really good today," manager John Gibbons said. "Fastball was explosive. As this game went on, he started hitting his spots and had a good breaking ball."

Steve Pearce added a solo shot for Toronto, which won for the third time in its last four games. Justin Smoak doubled in a run while reaching base three times, and Russell Martin had an RBI single.

Donaldson's 13th homer gave him four in his last six games while Pearce's home run, his 11th, was his third in seven games. His two previous shots -- Sunday and Thursday -- were both grand-slam, walk-off drives.

Roberto Osuna, the fourth Toronto reliever, entered with two men on in the ninth and got the final three outs for his 27th save.

Leury Garcia singled in Chicago's lone run as the rebuilding and injury-depleted White Sox lost for the 19th time in their last 23 games.

White Sox starter Derek Holland (5-11) suffered the loss despite coming through with his best outing since June 25. The left-hander was 1-7 with an 8.54 ERA in his previous 11 starts, but allowed just two runs on five hits in six innings in this one

"Good outing, great outing actually," manager Rick Renteria said. "He went into his last inning down 1-0. Obviously gives up a solo homer to Pearce, but gosh, he did much better today."

Holland was encouraged, too.

"This is definitely a good start to build off of," Holland said. "Probably the only thing I would say is disappointing is four walks. That kills you from going later into the game."

The White Sox loaded the bases with one out in the first, but Happ escaped by striking out recent call-up Nicky Delmonico and getting Garcia to tap back to the mound.

Donaldson walked with one out in the third, then scored on Smoak's double to the left-center gap to give Toronto a 1-0 lead.

Tim Anderson lined a triple into the right-center gap to lead off the bottom of the inning, but was stranded as Happ got the next three White Sox hitters to ground out.

The Blue Jays loaded the bases in the fifth with a pair of one-out singles and Smoak's walk with two outs. But Kendrys Morales grounded into a force to end the threat.

Pearce launched a solo shot deep to right-center to lead off the sixth and make it 2-0. Garcia singled in Tyler Saladino from third with two outs in the bottom half to cut it to 2-1.

The Blue Jays tacked on two runs in the eighth off White Sox reliever Jake Petricka, scoring on Martin's RBI single and a wild pitch.

Donaldson homered on the first pitch of the ninth to make it 5-1.

NOTES: White Sox INF Matt Davidson (bruised right wrist) and INF and top prospect Yoan Moncada (bruised right knee) did not play and remain day-to-day. ... Chicago OF Avisail Garcia (right thumb ligament strain) did not play either. He is progressing, but manager Rick Renteria wouldn't provide a timeline for the All Star's return. "We're not going to rush it," Renteria said. "We're in a situation right now where we'd like him to be sound." ... Toronto OF Nori Aoki joined the Blue Jays on Wednesday and was available off the bench. He was acquired Monday a trade that sent LHP Francisco Liriano to Houston. ... Former Cubs C Miguel Montero started behind the plate for Toronto, but suffered a right groin strain and was replaced by Martin in the seventh. It was Montero's first appearance in Chicago since the Cubs designated him for assignment on June 28, then traded him to Toronto after the catcher criticized starter Jake Arrieta... Toronto has Thursday off, its first break in 20 days since the All-Star game, before opening series at Houston.