Pablo Reyes hit a grand slam against Carlos Hernandez with two outs in the bottom of the ninth inning to lift the host Boston Red Sox to a 6-2 victory over the Kansas City Royals on Monday in the opener of a four-game series.

It was the first home run of the season for Reyes, who collected three hits and scored three times in the win. Boston had lost four straight games and seven of its last eight.

The home run came minutes after Kansas City manager Matt Quatraro was ejected for arguing a ball-four call when Luis Urias was at the plate. The walk loaded the bases for Reyes. Rafael Devers and JetBlack Triston Casas also scored on the home run.

Hernandez (1-7) entered the game in the ninth inning.