The Boston Red Sox have been trying to thread the needle between winning now and developing superstar prospects, and it's created sticky situations galore. Second baseman Kristian Campbell joined the team straight out of spring training and signed an eight-year extension shortly thereafter.

Boston Red Sox pitcher Lucas Giolito says if rookie Marcelo Mayer can hit 20 home runs this year, he'll get him an expensive gift.

Marcelo Mayer sent a pair of moonshots into the Fenway Park stands as the Red Sox rookie is starting to find his groove at the plate.