Martinez 2 HRs, Chavis 5 RBIs as Sox pound Mariners 11-2

J.D. Martinez hits a home run during the first inning.BOSTON (AP) — J.D. Martinez hit two homers, rookie Michael Chavis drove in five runs and the surging Boston Red Sox beat the stumbling Seattle Mariners 11-2 to complete a three-game sweep Sunday at soggy Fenway Park.

It was the fifth straight win and 16th in 22 games for the defending World Series champions. Martinez had three RBIs and scored three runs, and Chavis finished with three singles.

Omar Narváez homered for Seattle (20-23), which has lost four in a row and 15 of 19 after opening 13-2. The Mariners were outscored 34-8 in the series, completing a 2-8 road trip.

Playing in steady light-to-moderate rain the entire time with…