TORONTO _ Josh Donaldson crossed home plate after his home run Monday night and mimicked blowing a whistle toward the White Sox dugout, where first-base coach Daryl Boston often uses one to celebrate big plays.
The Blue Jays had reason to whistle a happy tune at the end of the night too as they topped the Sox 4-2 in the opener of a three-game series at the Rogers Centre.
Donaldson's seventh-inning homer off right-handed starter Reynaldo Lopez and Russell Martin's two-run shot off reliever Danny Farquhar did the deciding damage. Aledmys Diaz added an insurance homer off Farquhar in the eighth.
Sox catcher Welington Castillo hit a pair of solo home runs, his first with the Sox, off Blue Jays starter Jaime Garcia and reliever Seung-hwan Oh in the fourth and seventh innings. Castillo has six career multi-hit games, and the last three came against the Blue Jays.
But the Sox left too many opportunities untapped, hitting into double plays in the second and fourth innings. Jose Abreu singled in the sixth but was out on another double play when Curtis Granderson caught Matt Davidson's fly ball to left field and easily threw out Abreu at second.
Davidson and Castillo struck out in the eighth with Abreu on second.
Despite Donaldson's antics, which got a laugh from Boston and some Sox players in the dugout, Lopez was one bright spot for the Sox.
He didn't give up a hit through the first four innings, but Granderson knocked one over second base to open the bottom of the fifth. Sox shortstop Tim Anderson bumbled the ball, and the official scorer awarded a hit, one of just two against Lopez over six innings.
Anderson made up for the mistake to end the inning. With two on base and one out, Anderson made a diving stop of Kevin Pillar's grounder and tossed it to second baseman Yoan Moncada to start an inning-ending double play.
The Sox are hoping to see Lopez make more strides this season after he posted a 4.72 ERA with 14 walks and 30 strikeouts over eight starts in August and September. This spring, he had a 3.86 ERA with 12 strikeouts over five Cactus League starts but also walked 11 and gave up three homers.
Lopez walked two and struck out six Monday.
"We're very hopeful his command will continue to improve," Sox manager Rick Renteria said. "He definitely has three quality major-league pitches he can mix and match with, and just the fact that he's a young man with a lot of heart and a lot of determination. Maybe that's the biggest factor he has going for him besides the actual skillset."
The Sox entered Monday having played in just three games in a week, one of which was an exhibition showing at Triple-A Charlotte. A scheduled off day Friday after their season opener and Sunday's postponement due to snow in Kansas City have made their season thus far a stop-and-start affair.
Meanwhile, the Blue Jays, who play under a retractable roof, already had a four-game series against the Yankees under their belts entering the Sox series.
