Sherman says vengeance was on his mind when he picked his new team.
RELATED: Richard Sherman switching teams in NFC West, to join 49ers on three-year deal
The 49ers and the former All-Pro player agreed to a three-year deal worth up to $39.15 million.
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VIDEO: Seahawks star Richard Sherman talks to ABC7 on ESPYs red carpet
VIDEO: Seahawks star Richard Sherman talks about Kaep