The Kansas City Chiefs have added an insurance policy to the record-setting, 10-year extension given to Patrick Mahomes, according to a source.

The move protects the Chiefs in the event that an injury prevents Mahomes from being available to play.

Such policies are not common in the NFL, but given the $140 million in guaranteed money that Mahomes received, both sides knew the decision would be executed prior to the start of the regular season.

The contract is worth $450 million over the 10-year period and could grow to $503 million.