Historical clue formulations

• Raiser of team spirit — 2021-11-28
• Pregame morale builder — 2009-12-28
• Winning words? — 2005-12-09
• Coach's encouraging words — 2005-07-25
• Locker room activity — 2001-08-01
• Certain motivator — 1998-09-26
• Half-time event, maybe — 1997-01-25