Coach Brian Schottenheimer said Guyton would undergo more examinations on Friday.
Receiver CeeDee Lamb was a limited participant late in the game with a thigh injury. Lamb suffered the injury in the Week 3 win at Houston. Schottenheimer said Lamb was hit on the same thigh during the Buccaneers game.
Lamb finished with just two catches for 9 yards. He was targeted five times in the loss. Lamb wasn’t targeted until 9:32 to play in the first half and it was an incomplete pass. Quarterback Dak Prescott sent three consecutive passes toward Lamb that all fell incomplete, with two of the throws at his feet.
Last week, Lamb caught 17 passes for 189 yards with a touchdown while being targeted a career-high 21 times.
With Lamb off the field, No. 3 receiver Ryan Flournoy had three catches for 90 yards and a dropped pass that led to an interception.
Clark left the game with a hamstring injury and didn’t return.