Free-agency flops are a part of life in the NFL.
The high-pressure environment of the market, big dollars thrown around and annual demand for improvement lead to players just not meeting expectations—from teams or fans alike.
This year could be especially risky given some of the signings so far (such as a certain development in the Windy City). Without the usual meet-and-greet approach to signings like we'd see in a normal year, the risk seems amplified for teams.
Based on schematic fit and a measure of expectations, these are likely to be the biggest duds from the market so far.