BOSTON — Red Sox starter Brayan Bello showed his athleticism while covering first base during the first inning Tuesday. He stretched out fully and kept his foot on the bag to complete a 3-6-1 double play and escape a bases-loaded jam. He fell to the dirt once the play was completed.

Triston Casas hit a three-run home run that helped propel the Boston Red Sox to an 8-3 victory over the visiting Seattle Mariners on Tuesday in the first matchup of a three-game series.

Brayan Bello works five innings in his first start of the season, and Alex Bregman and Triston Casas each drive in three runs.