Possible Clues:

• Team that ended a "curse" in 2004
• Team known as the Americans until 1907
• 2007 World Series champs
• Team that's played in the same home park since 1912
• Team whose playing venue appears on the National Register of Historic Places
• Baseball champs of 2013
• Babe Ruth's first big-league team
• Boston team
• Yankees' rival
• American League team