Jalen Ramsey has suffered a small tear in the meniscus of his right knee.
Ramsey was the fifth overall pick in the 2016 NFL Draft by the Jacksonville Jaguars.
Ramsey's knee was sore after practice, the source said, leading to an MRI the next day that revealed the small tear.
The Jaguars expect Ramsey to be available for Week 1 of the regular season.