Scott Dreisbach rallied Oakland to an exhibition victory for the second straight week, but the backup quarterback missed the end of Sunday's 10-3 win over Dallas after breaking his right leg on a bootleg that set up the decisive touchdown.
Dreisbach, taken off the field on a cart with 1:45 to play, led the Raiders for most of a 10-play, 77-yard drive capped by Tyrone Wheatley's 1-yard plunge with 35 seconds left that gave the Raiders the victory over the penalty-prone Cowboys.
"I had a first down. I'm young and I thought if I had another few yards I had a touchdown," Dreisbach said as teammates came by to offer congratulations and condolences. "I don't know why I didn't slide maybe things will change now."
Three plays later, Wheatley scored to complete a drive that had a distinctly maize and blue tint. The drive started after an interception by Marcus Ray, who like Dreisbach and Wheatley played college football at Michigan.
Dreisbach, who was 8-of-12 for 111 yards, had been one of the biggest surprises of Oakland's training camp. A week earlier, he threw a touchdown pass with 1:38 left to give the Raiders an 18-17 win at St. Louis.
Dreisbach, signed as a free agent, probably would have had a good chance at winning the third-string job due as much to Barnes' poor play as to his own performances. Barnes was 2-of-7 for 31 yards and an interception Sunday.
"We lost a good young prospect. He brought us back two weeks in a row," Raiders coach Jon Gruden said. "Scott made a strong move today, and based on that he would have moved up the ladder."
The Cowboys lost for the second time in a week and are 0-7 in exhibition games under second-year coach Chan Gailey. They lost 2-17 in overtime to Cleveland on Monday night.
The Cowboys were plagued by penalties for the second consecutive game. Six days after being flagged 17 times for 149 yards in the loss to Cleveland, Dallas was penalized 11 times for 80 yards against the Raiders.
Late in the third quarter, Dallas backup offensive tackle Jeremy Akers was called for a false start on consecutive plays as the Cowboys struggled deep in their own territory.
The Raiders were nearly as sloppy. They were penalized eight times for 64 yards Sunday, giving them 17 penalties in their first two games.
The score was tied 3-3 heading into the final minute. Richie Cunningham kicked a 25-yard field goal for the Cowboys in the first quarter and Michael Husted kicked a 25-yarder for the Raiders in the second period.
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