ANDY REID has admitted he does not "understand a rule" after Teair Tart SLAPPED Travis Kelce.

The Kansas City Chiefs star was struck by the defensive tackle during the defeat to the Los Angeles Chargers.

Tart, 28, was allowed to stay in the game as the referee claimed it was not a "disqualifying action".

The slap came during the third quarter of the game in Brazil on September 5.

Kelce , 35, was slapped on the helmet, and then the pair both pushed each other in the bust-up.

The referee threw a flag into play and called for a 15-yard unnecessary roughness penalty on the Chargers' man.

Chiefs head coach Andy Reid , 67, is hoping that the NFL investigates why Tart was not removed from the field.

He is planning on speaking on the NFL to discuss the rule but remained tight-lip

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