The Bills had an injury scare at Saturday’s practice when wide receiver David Nelson went down with a right knee injury, but the team doesn’t believe it is serious.

“They said it’s like a bruise, they don’t think it’s any kind of ligaments or anything like that,” coach Chan Gailey said. “We’ll see what the determination is tomorrow.”

Nelson appeared to knock knees with a Bills defender before going down to the ground in a team drill. After being attended to by trainers for several minutes, he was able to walk slowly to the locker room under his own power but was in noticeable pain and was not happy. Nelson is Buffalo’s top option in the slot and has become one of Fitzpatrick’s favorite targets in the passing game.

Other Bills training camp news:

  • Defensive end Shawne Merriman missed practice after rolling an ankle on Friday. “He taped it up and finished (Friday), but we held him out today,” Gailey said. “He went through the walk-through this morning, so it’s not like it’s a hobbling thing, but we’re going to make sure that he’s ready to go.”
  • Right tackle Erik Pears also sat out the session after aggravating a previous groin injury. “They don’t think it’s much, but they were being precautionary and we’ll see how soon we can get him back, hopefully tomorrow night if not hopefully Monday,” Gailey said
  • Buffalo’s defense, led by defensive linemen Mario Williams and Marcell Dareus, dominated the Saturday session. At times, the two seemed to get upfield to the quarterback at will. “We’ve got a lot of work to do on offense to meet their level of play right now, so it’s a little bit different than it has been,” Gailey said. “It’s good for our football team.”

For more updates, follow Bills correspondent Mark Ludwiczak on Twitter @CBSSportsNFLBUF and @MarkLud12.