Unhappy with how the Dallas Cowboys offense played during an afternoon practice, coordinator Jason Garrett kept his unit on the field for a little more work Sunday.
"We have high expectations for ourselves," wide receiver Roy Williams said. "Today wasn't very good for us, but we have another chance tomorrow. ... Look for big things."
Another problem from Sunday's workout was that right tackle Marc Colombo hurt his right knee. He left the field on a cart and was taken for an MRI exam. Colombo missed the last seven games of last regular season with injuries to his left leg, then returned for the playoffs.
The team's official Web site reported that rookie Sam Young replaced Colombo at right tackle, with Robert Brewster moving to the left side while swing tackle Alex Barron recovers from a sprained ankle. Barron is rehabbing, but his status is uncertain for the Aug. 21 game at San Diego.
Errant throws, dropped passes and other sloppiness were evident throughout team drills against the defense. So after the horn sounded and players stretched, Garrett sent everyone to another field for about 10 more minutes of slow-paced action.
"We just ran through plays so everyone knew what we were doing," said tight end Martellus Bennett, who returned from an ankle injury that's kept him out of the first two preseason games.
He made several tough catches, among the few afternoon bright spots for the offense.
Williams said that during the extra session they "just repeated a period." Asked if it was their worst one, he said, "All three periods were bad today."
What did Garrett tell the group?
"We just weren't the Cowboys offense. Don't do it again," Williams said.
Dallas has a single workout Monday afternoon. The team worked out twice Sunday, having done so Saturday as well.
The Associated Press contributed to this report.
