Christian McCaffrey received an odd fine from the NFL stemming from a play during the 49ers ' Week 4 loss to the Jaguars .

The 49ers' running back was fined $23,186 for the use of his helmet during his attempted tackle of Jacksonville linebacker Devin Lloyd after a Brock Purdy interception. McCaffrey launched with his helmet before making contact with Lloyd, who had two interceptions during the Jaguars' 26-21 win.

While he is an offensive player, McCaffrey became a defender on the play after the change of possession and that ultimately resulted in him being fined. In that vein, the NFL treated him as a defensive player who -- in the league's eyes -- used his helmet in an inappropriate manner.

McCaffrey did not receive a penalty on the field, but the league hit him with a f

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