Raiders may need to fill hole in offensive line

As the Raiders began the process of evaluating talent at the NFL scouting combine, clues began to emerge Wednesday as to the makeup of the roster courtesy of coach Jack Del Rio and general manager Reggie McKenzie. The Raiders could begin free agency with a considerable hole in the middle of their offensive line, given Stefen Wisniewski's expected entry into unrestricted free agency and the decision of the coaching staff to move right guard Austin Howard to right tackle.

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