OAKLAND, CA - AUGUST 11: Stefen Wisniewski #61 of the Oakland Raiders in action against the Arizona Cardinals at O.co Coliseum on August 11, 2011 in Oakland, California. (Photo by Ezra Shaw/Getty Images)
Oakland Raiders head coach Dennis Allen was caught off-guard by line coach's Steve Wisniewski's resignation -- and said that the team will be short a coach, as the quitting came "too late" for the Raiders to hire a replacement.
Wisniewski quit for "personal reasons," the Bay Area News Group reported. Frank Pollack is now the Raiders' only offensive line coach, the news agency reported.
"It was a bit of a surprise," Allen told reporters, adding that Wisniewski quit for "personal reasons" only.
"It was totally his decision," he said.
The Raiders will look to Pollack to guide the team back to the "zone blocking" approach last employed under former head coach Tom Cable in 2009.