ALAMEDA, Calif. -- As Jerry Jones watched the first quarter of Monday’s preseason opener against Oakland, he was like a lot of Cowboys fans -- hoping the team's top two offensive players would avoid injuries.

On the first play of the Cowboys’ second series, Jones saw tight end Jason Witten go off the field after taking a hit from Oakland linebacker Rolando McClain after quarterback Tony Romo slipped away from an onrushing Lamarr Houston.

On the next play, Romo was sacked by Tommy Kelly for a 12-yard loss after David Arkin missed a block to set up a screen.

“When I held my breath was when I saw Witten take that lick and it was the same play Tony got contorted,” Jones said. “Certainly after it was over, I said we’re probably getting to time to move on there with another quarterback in there.”

Romo and Witten returned for one more series before calling it a night.

“Ideally, you’d like to have gone down and gotten one in the end zone, but the answer is no,” Jones said when asked if he was concerned with the No. 1 offense’s showing. “I really liked what I saw individually from the offensive line and I had a chance to sit with John Madden and watch the offensive line in the second half and that’s his specialty there, where he likes to look, and he saw some of our guys do good.”

Jones mentioned backup tackle Jermey Parnell and Tyron Smith as standouts on the line, and he was pleased new center Arkin did not have a poor snap and seemed to get better as the game went on.