Masataka Yoshida hit a grand slam and a two-run triple, powering Kutter Crawford and the Boston Red Sox to an 11-5 blowout over the Chicago Cubs on Sunday.

Rafael Devers and pinch-hitter Triston Casas also homered for the surging Red Sox, who have won seven of eight. Crawford allowed one hit in six shutout innings.

Yoshida launched the second grand slam of his rookie season in Boston’s five-run fifth against All-Star lefty Justin Steele. Yoshida connected for his 11th homer on a 2-0 count after the Red Sox put together four straight hits, extending their lead to 6-0. Rob Refsnyder had an RBI single.

Yoshida added a two-run triple in the seventh, and a single in the ninth off catcher Tucker Barnhart. Yoshida’s streak of eight straight multi-hit games ended Saturday - it was the longest by a Red Sox left-handed hitter since Ted Williams in 1940.

Steele (9-3) allowed six runs and 10 hits over six innings after tossing a scoreless inning at Tuesday’s All-Star Game.

Cubs SS Dansby Swanson (bruised left heel) was eligible to be activated Sunday but remained on the injured list. He continued baseball activities.

Drew Smyly (7-6, 4.31) is scheduled to start Monday against Washington LHP MacKenzie Gore (4-7, 4.42).