Boston's Franchy Cordero blasts walk-off grand slam to beat Mariners

Franchy Cordero hit a two-out, two-strike grand slam to right-center field in the 10th inning as the Boston Red Sox swept a four-game series from the visiting Seattle Mariners with Sunday's 8-4 win.

The Sox scored five runs in the extra frame, beginning with Enrique Hernandez tying the score at 4-4 with a single through the right side.

Hernandez and Jackie Bradley Jr. both had multiple hits and Trevor Story and Christia