Complex sentence: Castillo opened up the 2008 season as the team's starting third baseman, proving to be an able replacement for the Giants' departed third baseman, Pedro Feliz, providing solid defensive play and hitting.268 with 26 RBIs through the month of June.
Split into simpler sentences: Castillo opened up the 2008 season as the team's starting third baseman. Castillo proved to be an able replacement for the Giants' departed third baseman,, providing solid defensive play and hitting.268 with 26 RBIs through the month of June.