BUFFALO (AP) — 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.

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.

JAGUARS

ROOKIE RETIRES

JACKSONVILLE, Fla. — Jacksonville Jaguars safety Zedrick Woods, an undrafted rookie from Mississippi, has submitted retirement paperwork with the NFL instead of reporting to training camp.

The Jaguars made the announcement Monday after rookies arrived at the facility. Woods was placed on the team’s reserve/retired list.

Woods’ agent, Ron Butler, says his client has been dealing with a turf toe injury that prompted the decision.

Woods had a decent shot at making Jacksonville’s roster, especially since the team’s safety position is considered one of its thinnest. The group includes inexperienced starters Ronnie Harrison and Jarrod Wilson as well as veteran backup Cody Davis. Three more undrafted guys — C.J. Reavis, Andrew Wingard and Joshua Moon — would have been vying with Woods for the final roster spot.