DETROIT -- Walks will come back to haunt you -- especially with Rafael Devers lurking in the on-deck circle.

Devers came to bat in the second inning with the bases loaded, and connected for his fifth career grand slam to tip the game in favor of the Red Sox, who went on to a 14-5 win over the Tigers on Saturday afternoon at Comerica Park. He later pulled a solo home run for his 13th career multi-homer game and fourth blast of the season.

Boston (4-4) scored six runs on two hits in the second to blow the game open early, capitalizing on four walks from left-handed starter Joey Wentz, who was relieved after the last of those free passes.

Right-hander Garrett Hill was summoned from the bullpen with two outs and the bases loaded. Devers got ahead, 2-1, in the count, and Hill threw a changeup on the low, outside corner.

Not a bad pitch.

Unless you’re facing a left-handed hitter who is one of the game’s best, and who can handle anything. Devers went the other way, driving the ball solidly and over the head of left fielder Akil Baddoo.

Neither Red Sox manager Alex Cora nor center fielder Adam Duvall -- who later drilled a two-run homer -- could figure out how Devers hit that ball over the fence.

“I have no idea how he can do that,” said Cora. “It was a pitch that was going away and he stays inside and gets barrel. He drives it that way. He saw a few off-speed pitches and swung and missed at a fastball. But just to be able to do that -- that’s impressive.”

Duvall and Devers became the first teammates in the Majors to both reach four homers this season.

What has Duvall learned from Devers in their first season as teammates?

“Well, I know he’s got some oppo juice,” said Duvall. “If I could learn some of that, that would be nice. Just the professional at-bat. He can always hurt you and do damage.”

Devers smiled when their comments were relayed, and said through an interpreter: “They were working me a little bit different. I missed the fastball the previous pitch and I was trying to look for another pitch, and I was able to get to that pitch and hit it out of the ballpark. That’s a pitch I’ve been looking for a lot lately.”

Devers hit his second homer in the seventh off left-handed reliever Tyler Alexander. He pulled a cut fastball on the high, inside corner.

“I try to adjust to the pitcher and those things are going to happen if you adjust well to the pitcher,” said Devers. “That’s a good result on that pitch.”

Devers, who was signed to a $17.5 million contract in the offseason before he inked a 10-year deal worth $313.5 million, drilled both pitches at the exact opposite areas of the strike zone into the seats -- once again showing his versatility to hit any pitch anywhere.

He’s a solid 6-foot and 240 pounds, and possesses great balance, hands and a feel for the strike zone. Put it all together and it spells power. He also noted that he lifts weights after each game, doing so again Saturday before talking to reporters.

Duvall’s two-run blast went 423 feet to left-center and traveled at a blistering 109.8 mph.

What impresses Duvall's manager most about his approach?

“Honestly, the patience,” said Cora. “We knew that he could hit a ball hard in the air to the pull side, but he’s been getting in good hitter counts. A 1-0 fastball, he put on a good swing. This is not just a swinger -- a big guy that hits the ball hard. He’s a quality at-bat."

Duvall grinned when Cora’s comment was repeated.

“I don’t really think of myself as a patient person,” said Duvall. “But I’ve been able to focus in on where I’m looking and what I’m looking for, and be able to lay off anything else. It’s cool to see I can have some patience.”

Duvall is coming off AL Player of the Week honors. He’s as hot as any hitter in the game, and entered the game leading the league in batting average (now .483), RBIs (14) and extra-base hits (10) with a monstrous OPS of 1.683.

Devers is batting .343 with nine RBIs. Together they drove in seven runs on Saturday.