2) Jim Plunkett - 122.8
One of the greatest Raiders of all time, Jim Plunkett was not expected to ascend to that mantle when he bounced between the New England Patriots and San Francisco 49ers to begin his career. But then the late owner Al Davis found him, and what resulted is still to this day the franchise's best run of success.
Buoyed by wideouts Cliff Branch and Bob Chandler and returning tight end Raymond Chester, he was dominant in 1980. And it got better in 1983 when running back Marcus Allen joined him as Plunkett and Co. lifted the Super Bowl trophy.
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His 122.8 Super Bowl passer rating would stand until being surpassed by...