BUFFALO, N.Y. — A person familiar with the situation tells The Associated Press the Buffalo Bills have placed running back Frank Gore on the non-football injury list due to what is considered a minor injury.

The person did not reveal the nature of Gore's injury or how he was hurt in speaking to The AP on the condition of anonymity because the team has not released any information. Gore was placed on the list Monday, three days before the Bills open training camp in suburban Rochester, New York.

Buffalo signed the 36-year-old Gore to a one-year contract in free agency in March. He is the NFL's active leader with 14,748 yards rushing and being counted upon to play a backup role behind LeSean McCoy.

The NFL's transactions list also shows Buffalo placing tight end Tyler Kroft and guard Jeremiah Sirles on the physically unable to perform list. Kroft is in jeopardy of missing the start of the season after having surgery in May to repair a broken foot he hurt in practice.

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