An offensive outburst by Josh Donaldson helped put struggling pitcher Marcus Stroman back in the winner’s circle.

Donaldson hit a grand slam and finished with five RBIs, Edwin Encarnacion hit a two-run homer and the host Toronto Blue Jays routed the Philadelphia Phillies, 11-3, on Tuesday.

Kevin Pillar hit a leadoff blast in the second and Ezequiel Carerra drilled a two-run shot in the third as the Blue Jays roughed up Phillies rookie Zach Eflin (0-1) to win for the 11th time in 14 meetings with Philadelphia.

Stroman (6-2) allowed two runs and six hits in seven innings to win for the first time in four starts.

“He looked like the old guy,” manager John Gibbons said. “It showed he’s back.”

Stroman struck out six and got 11 of his 21 outs on ground balls.

“He located his pitches down in the strike zone very well,” Phillies manager Pete Mackanin said. “To righties and lefties that slider was really diving.”

Stroman had posted a 7.58 ERA in his previous five starts but held the Phillies scoreless until Jimmy Paredes hit an RBI double in the sixth.

“I felt better,” Stroman said. “Not exactly where I want to be but looking forward to the next one.”

Donaldson doubled and scored in the first, doubled home a run in the second, and hit his third career grand slam in the third. It was the second grand slam of the season for Donaldson, who also hit one April 8 against Boston.

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“I was able to get some pitches to hit today and I took advantage,” Donaldson said.

Donaldson reached for a fourth time in the seventh when he walked and scored on Encarnacion’s homer off Colton Murray. For Encarnacion, who sat out Monday night with a sore right index finger, the blast was his fourth in four games.

Encarnacion’s two RBIs gave him a major league-best 56, one more than Boston’s David Ortiz.

Making his major league debut in place of injured righthander Vince Velasquez, Eflin (0-1) allowed nine runs, eight earned, and nine hits in 2 2⁄3 innings. He walked three and struck out two.

The eight earned runs were the most allowed by a Phillies rookie since Gavin Floyd gave up eight against the Mets on April 19, 2005.

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Papelbon goes on diabled list

The Washington Nationals have placed closer Jonathan Papelbon on the 15-day disabled list with a right intercostal strain and reinstated righthanded reliever Matt Belisle following a rehabilitation assignment.

Manager Dusty Baker said Papelbon’s injury occurred while the righthander was warming up Sunday, when he pitched one inning against the Phillies. He allowed a go-ahead home run to former teammate Maikel Franco before Washington rallied for a 5-4 win.

Baker didn’t have a timetable for Papelbon’s return.

Shawn Kelly got the final five outs in Monday night’s 4-1 win over the Cubs for his first save.

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Papelbon is 1-2 with a 3.28 ERA and 16 saves. The 35-year-old heads to the DL for the first time in his career.