Historical clue formulations

• Baseball team whose mascot is Wally the Green Monster — 2025-08-03
• See 19-Across — 2018-07-03
• 2013 World Series champs — 2017-08-24
• Team whose playing venue appears on the National Register of Historic Places — 2014-06-14
• Team known as the Americans until 1907 — 2009-09-26
• Winner of the first World Series (as the "Americans") — 2006-12-22
• 2004 World Series "curse" beaters — 2005-10-03
• Ted Williams and others — 2003-01-16
• 1986 World Series losers — 1996-06-28