Hall left Tuesday's practice early with a trainer, Rich Cimini of ESPN.com reports.
Hall walked off the practice field Tuesday morning, leaving Braelon Allen and Isaiah Davis to handle first-team backfield reps. There's been some chatter this summer about the new coaching staff dividing RB work more evenly, with Allen in particular said to be making a good impression, but Hall still figures to be the starter and lead runner heading into Week 1, assuming Tuesday's issue is nothing serious.