According to Matt Miller of the Bleacher Report the Chicago Bears will sign tight end Martellus Bennett tonight.
Former Giants tight end Martellus Bennett reached agreement with Bears on a four-year deal.
— Adam Schefter (@AdamSchefter) March 12, 2013 
Can confirm: Chicago #Bears  will be signing TE Martellus Bennett tonight.
— Matt Miller (@nfldraftscout) March 12, 2013 
— Martellus Bennett (@JoeGryffindor) March 12, 2013 
Martellus Bennett is heading to Chicago to join the #Bears . A big-time pass-catching athlete.
— Ian Rapoport (@RapSheet) March 12, 2013