Scott Lauber ESPN Staff Writer
Mariners 6, Red Sox 5: Talk about a gut punch. One strike from winning a 13-inning marathon, the Red Sox lost on Guillermo Heredia's game-tying RBI single, a wild pitch by Doug Fister, a walk and an infield single by Jean Segura. Boston has lost four games in a row, their lead in the AL East down to one game over the Yankees. On a night when the Red Sox traded for infielder Eduardo Nunez, baby-faced 20-year-old top prospect Rafael Devers made his debut and went 0-for-4 with two walks, one run scored and a few nice defensive plays at third base.