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They had over 20 fantasy points per game combined in their backfield with Charbanet and Ken Walker.

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Seattle backfield combined for over 20 fantasy points per game last season

The source notes that Zach Charbonnet and Kenneth Walker III combined for over 20 fantasy points per game in the Seattle backfield last season.

Zach Charbonnet headshotZach CharbonnetRB · SEAPlayer page — value, ADP, projections, and every insight