Five Cowboys position battles to watch at training camp
Quinn suffered the injury during a pass rush drill against left tackle Tyron Smith. He was taken off the field.
Vice president Stephen Jones confirmed the injury and said it will require surgery, sidelining him for the preseason.
Quinn will head back to Dallas for surgery.
But Jones said he should be ready for the season opener against the New York Giants on Sept. 8.
Jones said the injury was similar to one running back DeMarco Murray suffered in 2014. Murray didn’t miss any games.
“The relief is he is going to be back fine and do what he needs to do to get ready to play the Giants,” Jones said. “I don’t think we are looking for him to miss any time.”
Jones said Quinn was having a great camp.
The Cowboys acquired Quinn in a trade with the Miami Dolphins in March to replace the suspended Randy Gregory.
With Tyrone Crawford still rehabbing from offseason surgery, Taco Charlton and Dorance Amstrong will rotate with the first team at right end in his place.
In other injury news, linebacker Luke Gifford suffered a compound dislocation of a finger on his right hand. He will be further evaluated, according to Jones.