Tennessee Titans running back Derrick Henry is not practicing due to a lower leg injury and there is no timetable for his return, coach Mike Vrabel said Sunday.
Henry reportedly was spotted at training camp Friday in a walking boot.
Henry, 25, posted career highs with 1,059 rushing yards and 12 touchdowns last season.
He had a record-tying 99-yard touchdown run against Jacksonville in Week 14.
Henry has accumulated 2,293 rushing yards and 22 touchdowns plus 39 catches for 372 yards and one score in 47 games since the Titans drafted him in the second round of the 2016 NFL Draft.
Tennessee is thin at running back, with 28-year-old Dion Lewis and special teamer David Fluellen next on the depth chart.