Historical clue formulations

• One might be offensive — 2021-12-17
• Tackle, for one — 2020-04-15
• Utility worker — 2017-10-01
• One of the front four — 2003-02-12
• Center or end — 1998-08-09
• Back blocker — 1997-12-07
• Guard, e.g. — 1995-05-30
• Center, for one — 1994-06-30