There's no quarterback controversy in Oakland -- for now.
"They turned up the blitz a little bit more on him, and it started to get out of hand," Cable said. "(Campbell will) be the starter next week, there is no issue there. We just felt like a change was needed."
"We played against a really tough defense today that got after us," said Campbell, who was 7 of 19 for 70 yards and an interception. "Once we got behind the 8-ball and they got all the momentum, they just kept bringing it and bringing it."
Gradkowski, who threw three touchdown passes during the final nine minutes of Oakland's stunning win in Pittsburgh last season, couldn't get anything going. He was 13-of-24 passing for 98 yards and an interception.
The Associated Press contributed to this report.