Historical clue formulations

• M.L.B.'s oldest continuously operating franchise, established as the Boston Red Stockings in 1871 — 2020-05-16
• Team with home games at SunTrust Park — 2019-06-13
• Team that has won the World Series three times while based in three different cities — 2011-04-23
• Phil Niekro and others — 2004-01-10
• Warpath goers — 2001-05-13
• Meets head-on — 1998-05-16