Bowers wasn't seen on the field during the open portion of Wednesday's practice, Ryan McFadden of ESPN.com reports.
Bowers remained healthy throughout training camp and the preseason after a lingering PCL injury and bone bruise in his knee sidelined him for five games in 2025, but he could be dealing with a new health concern leading up to Las Vegas' Week 1 matchup with the Dolphins. The Raiders will release their first injury report of the season later Wednesday, when an explanation behind Bowers' absence will be provided.