Richard Sherman has $40 million guaranteed. That's about $15 million more than ET.
That's not that far off from Aaron Rodgers ($54 million), Matt Ryan ($42 million), Drew Brees ($40 million), and any of the other highest paid QBs with the most guaranteed money.
This screams of Schefter making stuff up again because he knows the team cannot respond directly to a question about a specific contract term. It also could be Russell's agent trying to stir up conversation about how much guaranteed money Russell should have, knowing that he probably wants more than the standard 30-49% guaranteed.