Forte told the newspaper that without a new deal, he wants to protect his body, citing the shaky field conditions at Soldier Field among his concerns.
Bears general manager Jerry Angelo told the Tribune that Chicago has no timetable to finalize a contract extension for Forte.
"I've considered not playing in the preseason games," Forte said. "But just to make that a fact, and say 'I'm not going to,' I haven't gotten there yet."
"Any time the field is not good enough to practice on -- that is a concern," Forte said. "There is always a concern with injuries. You can get injured going out to practice."
"I have to talk to coach (Lovie Smith) and talk to Jerry and my agent (Adisa Bakari). We'd have to have a big meeting to really talk about (his contract situation and his safety)."