Mary Kay Cabot of The Plain Dealer reported that Garrett was still at the team complex being evaluated after the pass-rusher limped off the field under his own power on Wednesday.
The Browns have yet to issue further details on the injury, but coach Hue Jackson said Wednesday that it was "a good sign" to see Garrett leave the field without a trainer.
The uber-athletic defensive end dealt with a high-ankle sprain during his final season at Texas A&M before missing a portion of Browns OTAs with an undisclosed injury.
It's a high-profile setback worth monitoring, but Garrett has a month-plus to rest and prepare for his first NFL training camp. Stay tuned.