The Chicago Bears have signed veteran cornerback Alan Ball to a one-year contract. Ball previously visited the Carolina Panthers. The Panthers offered  Ball a one-year, $2 million contract, according to a league source. Under the terms of that offer, Ball would have received a $1 million signing bonus and a $950,000 base salary with a $50,000 workout bonus. Instead, Ball has signed with the Bears. Follow me on Twitter: @RavensInsider Aaron Wilson covers the Ravens for The Baltimore Sun