Defensive end Mario Williams, who was eased back into action last week as he comes off hip surgery, was also not on the field Tuesday.
"Mario was getting checked out today just to make sure everything was OK," coach Doug Marrone said afterwards.
Meanwhile, linebacker Brandon Spikes was in uniform but did not take part in team drills Tuesday.
"He's just coming back a little bit from his weekend soreness and stuff and from the lifting," Marrone said.
The Bills also made two changes in their first-team secondary, with Jonathan Meeks replacing Duke Williams at safety, as well as Mario Butler replacing Corey Graham (opposite Ron Brooks) at cornerback. Graham came on the field as the nickel-back during team drills.
Wide receiver Sammy Watkins returned to practice after missing two sessions last week for the NFLPA's rookie premiere in Los Angeles.