My beloved Bengals have worked out Mixon twice, which is a terrible mistake. However team owner Mike Brown is seriously big on giving guys second chances because he literally believes these guys who are great athletes deserve a chance at fortune so that they can do great things with their lives and their families. He's said so over and over again.
As for NE, mark my words, if he stays healthy you fans are going to love former Bengal, Rex Burkhead. Amazing work ethic. Shifty. Makes great reads, and always runs North/South. He fights for extra yards. He's quick as Hell with his feet. Also a great character guy, and does everything the coaches ask him to do.
It seems everyone in the AFC North thinks you have to have elite speed or can pound the pill like the Incredible Hulk to have any success running in this division. This is a run heavy division, Rex just needed a chance. He's going to do great in New England's Offense.