OAKLAND -- The Cowboys and Raiders are scoreless at the break in the preseason opener.
Here are some thoughts on what has transpired in the first half:
* David Arkin remained at center when the Cowboys brought in their second-team offensive line. The Cowboys want to give Arkin has many snaps as possible at center until starter Phil Costa returns from his lower back injury. While his snaps were fine, he did get called for holding.
* Tony Romo and the first-team offense got zero scores out of three possessions. Romo finished his night 3-for-6 for 30 yards. The Cowboys' first-team couldn't run the ball well and other than a reception by Dez Bryant for 24 yards and a six-yarder from Jason Witten, there wasn't much to be impressed with.
* The Cowboys' special teams unit had been called for four penalties with 12:40 to play in the first half. Three were accepted.
* Coach Jason Garrett could have taken a knee to end the first half, but made a good decision to run his two-minute offense. We saw a 20-yard grab by Andre Holmes during the drive, but Kyle Orton was picked off by safety Mike Mitchell to end the drive with five seconds left. We're not sure if Orton made a bad read here, but his pass sailed over Dwayne Harris.