Bears running back Matt Forte is considering sitting out Chicago's first preseason game on Saturday against the Buffalo Bills as his agent continues to negotiate a long-term extension with the organization. "That's a possibility," Forte said on Sunday. Forte, who is scheduled to earn $550,000 in base salary in the final year of his rookie contract, cites safety as the main reason he might make the difficult decision to skip the preseason opener. "It's a concern of mine," Forte said. "You don't want to go out there in a preseason game and, god forbid, something happened and then they say, 'Oh, you're injured, we can't give you a new deal.' "When you get to 29 or 30 years old, they look at you and say you're pretty old as a running back. In this position, you don't see a lot of guys get long-term deals. You don't see a lot of teams pay running backs. Some people say it's an expendable position; they get a new guy in every year. It's a dangerous position and maybe one of the most injured positions in the NFL." Read more: http://espn.go.com/chicago/nfl/story/_/id/6841810/matt-forte-chicago-bears-skip-preseason-opener