https://www.sportslingo.com/sports-glossary/i/illegal-formation/
What Is Illegal Formation In Football? Definition & Meaning On SportsLingo
Nov 11, 2021 - Read the Illegal Formation definition and meaning now on SportsLingo. Learn all the different meanings, abbreviations and definitions for what is a Illegal...
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https://www.phillyvoice.com/former-nfl-ref-claims-eagles-were-illegal-formation-philly-special-td/
Former NFL ref claims Eagles were in illegal formation for 'Philly Special' TD | PhillyVoice
Feb 12, 2018 - Mike Pereira argues that Eagles wide receiver Alshon Jeffery wasn't planted at the line of scrimmage on gutsy fourth-down play call in Super Bowl LII.