Raiders coach Dennis Allen said he expected assistant line coach Steve Wisniewski to be part of the staff and that his resignation came too late to bring in someone to replace him.

Wisniewski resigned for ``personal reasons'' -- a decision which tackle Khalif Barnes said he learned of through text message two weeks earlier. Allen didn't say when he was informed, but said the late notice led to making Frank Pollack the lone offensive line coach.

``It was a little bit of a surprise,'' Allen told reporters Sunday. ``Obviously, he has his personal reasons as to why he made that decision. I will say this, it was totally his decision. It was nobody else's decision.''

Pollack, who was the assistant line coach in Houston last season where Raiders offensive coordinator Greg Knapp was quarterbacks coach, will be primarily responsible for returning the club to the zone blocking system it used exclusively under Tom Cable from 2007 through 2009.

When Hue Jackson arrived as offensive coordinator, replacing Knapp, in 2010, Oakland integrated zone blocking with gap and power blocking.

``We thought about whether to bring in somebody or not and we just felt like at this point, the right thing to do was stick with the coaches we had and go forward,'' Allen said. ``I've got every confidence in the world in Frank Pollack as an offensive line coach.''



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