All about position scarcity. Have to look at what other teams are planning to keep. In a 3-keeper league, I'd imagine QBs like Rivers (in that low first tier/high second tier area) are being let go. Have to remember, Rivers lost his best receiver, his stud TE has the paint chipping off pretty badly, and his third-down back. Vincent Brown looks good and Robert Meachem can do the deep ball thing, but Rivers has definitely seen his supporting cast take a hit. I think that knocks him down to even with a Tony Romo, perhaps even a Matt Ryan. However, if there are simply no QBs being allowed to walk, guess you have to keep him. But if there are any you like not being kept, stock up on WRs - depth there is just as critical as depth at RB, these days. Food for thought.