The former Buffalo Bills' signal-caller is the top free-agent quarterback on the market, but there are few places where he would have a chance to start.
Fitzpatrick spent two seasons with Lewis before leaving in 2009 for the Bills and a chance to become a starting quarterback.
Fitzpatrick had a chance to prove he was a starting quarterback in Buffalo, and he crashed and burned.
Lewis and the Bengals' organization know what he brings to the table, and according to the team's website, team president Mike Brown -- who like Fitzpatrick is a former Ivy League quarterback -- has "high regard" for Fitzpatrick.
Fitzpatrick couldn't be a difference-maker in Buffalo, but if he has to play a series or even a game as a backup, he won't lose games either. That stability is exactly what a team with playoff aspirations like the Bengals needs.
Follow Kevin Patra on Twitter @kpatra.