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One of the most perplexing calls during the Cowboys' 34-31 loss to the Packers on Sunday came in the first half when Cowboys wide receiver Brice Butler was flagged for unsportsmanlike conduct.
If you didn't watch the game and heard that Butler got flagged for that, you'd probably assume he got into a scuffle or pushed another players, but that's not what happened at all. The Cowboys were penalized 15 yards on the play because Butler violated a little-known substitution rule.