Historical clue formulations

• Longhorn's rival — 2026-09-12
• Longhorn rival — 2020-08-20
• Oklahoma athlete — 2019-07-18
• Better, to an impatient boss — 2017-11-05
• Longhorn rival — 2017-10-20
• Tulsan, e.g. — 2011-10-12
• Nickname for a cheater in the Oklahoma land rush of 1889 — 2008-10-17
• Tulsa native — 2008-02-24
• Oklahoma athlete — 2007-01-09
• Oklahoma native — 2005-03-22
• Oklahoma athlete — 2004-04-15
• Later's alternative — 2003-05-12
• It's better, in a phrase — 2002-09-29
• Cornhusker archrival — 2002-06-12
• 53-Down native — 1999-09-03
• With more expedience — 1999-05-01
• Oklahoman — 1999-04-05
• Norman native — 1999-04-04
• Garth Brooks, notably — 1998-11-26
• Fort Sill resident — 1997-05-17
• Jayhawk rival — 1996-01-27