Before he made the decision, he had the choices in the New England Patriots and Buffalo Bills. I am not clear what caused him to make the final decision, but obviously he is the very player the Bears head coach Lovie Smith wants.
Tinoisamoa is smart, quick, and strong, with all of the quality a Smith coached defense needs. Also he recorded 661 tackles along with 10 sacks during his tenure in St. Louis.
Definitely, Tinoisamoa's joining will addd add depth and speed to Bears' defense.