1. San Francisco 49ers
Sherman played college ball in the backyard of the Niners facility and stadium at Stanford. He played under Robert Saleh, the 49ers' defensive coordinator who was a quality control coach in Seattle from 2011-13. Sherman has been on the other side of what was one of the NFL's better rivalries and might be interested in attempting to rekindle it in enemy territory.
Jimmy Garoppolo certainly looked the part in going 5-0 as the Niners starter down the stretch last season. With Kyle Shanahan and Garoppolo entering Year Two, it says here the Niners' offense will be just fine.
But the defense, where Ahkello Witherspoon is penciled in as CB1? It needs a lot of work, and the Niners have more cap room to work with than all but five NFL clubs. They're expected to aggressively attack rebuilding the 'D,' and could splurge a bit to bring Sherman back to his college stomping grounds.
Plus, reports indicate the Niners were interested in Marcus Peters and Aqib Talib before another rival, the division champ Rams, closed the deal with both veteran corners. Sherman would be a high-risk, high-reward consolation prize.