BOSTON — Christian Encarnacion-Strand hit his first career grand slam during a five-run seventh inning and the Cincinnati Reds rallied to beat the Boston Red Sox 8-4 on Wednesday night.

Elly De La Cruz, TJ Friedl and Santiago Espinal added RBI for the Reds.

Nick Martinez (6-8) pitched 6 2/3 innings, yielding four runs off nine hits to help Cincinnati avoid being swept in the three-game interleague series.

Wilyer Abreu hit a two-run home run for the Red Sox. Romy Gonzalez drove in two runs, including an RBI double in the seventh to pull Boston within 5-4.

Brennan Bernardino opened for Boston, pitching 1 1/3 innings before handing off to Jorge Alcala and then Chris Murphy. That trio held Cincinnati to three hits and no runs over 5 2/3 innings before Greg Weissert took over.

Weissert (2-3) got the final out of the sixth. But things fell apart in the seventh when Stephenson led off with a single, followed by Rece Hinds reaching on a fielder’s choice and Gavin Lux walking to load the bases for Encarnacion-Strand. Weissert was pulled after surrendering five runs off four hits.

Earlier Wednesday, Abreu hit a tie-breaking RBI single in the eighth to help Boston earn a 5-3 win in the completion of a game suspended by rain on Tuesday.

KEY MOMENT

Abreu jumped on Martinez’s change-up in the sixth, driving it over the right-field wall and into the Reds’ bullpen beyond the reach of Hinds. It came after Hinds had made a catch against the same wall in the fifth, robbing Jarren Duran of an extra-base hit.

KEY STAT

Encarnacion-Strand’s grand slam was Cincinnati’s sixth of the season.