Historical clue formulations

• Samuel Langhorne ___ (Mark Twain's real name) — 2023-07-10
• Seven-time Cy Young Award winner of the 1980s-2000s — 2018-02-01
• Samuel Langhorne ___ — 2011-09-05
• Only starting pitcher since 1971 to win a league M.V.P. award — 2008-04-19
• Author Samuel — 1998-11-22
• Writer from Hannibal, Mo. — 1995-01-05