Complex sentence: Joshua is the younger brother of Jonathan Papelbon, the closer for the Boston Red Sox and 2006 Rookie of the Year award runnerup, and twin brother of Jeremy Papelbon, who plays for the Boise Hawks, Class A affiliate of the Chicago Cubs.
Split into simpler sentences: Joshua is the younger brother of Jonathan Papelbon, the closer for the Boston Red Sox and 2006 Rookie of the Year award runnerup. He is also the twin brother of Jeremy Papelbon, who plays for the Boise Hawks, the Class A affiliate of the Chicago Cubs.