Historical clue formulations

• Some offensive linemen, for short — 2020-02-13
• Some N.F.L. linemen: Abbr. — 2019-05-05
• QB protectors — 2017-12-29
• Some QB protectors — 2016-07-21
• Some QB protectors — 2014-10-17
• N.F.L. positions: Abbr. — 2014-05-23
• Some N.F.L. linemen — 2011-06-27
• They line up between centers and tackles: Abbr. — 2009-11-17
• Some football linemen: Abbr. — 2008-12-17
• Some football linemen: Abbr. — 2007-07-04
• Some linemen: Abbr. — 2006-12-31
• Some N.F.L. linemen — 2006-06-24
• QB protectors — 2006-02-11
• Some N.F.L.ers — 2005-09-23
• Some linemen: Abbr. — 2003-11-12
• N.F.L. positions — 1995-09-01
• N.F.L. linemen: Abbr. — 1995-01-30
• Football linemen: Abbr. — 1994-09-09