LAKE FOREST, Ill. — The Chicago Bears have signed quarterback Mark Sanchez, who is expected to back up Mike Glennon next season. The Bears announced the one-year contract Friday. Chicago is coming off a season in which it went 3-13 and finished last in the NFC North. The Bears cut quarterback Jay Cutler this month after eight seasons and the next day signed Glennon of the Tampa Bay Buccaneers to a three-year deal. Sanchez played in two games last season with the Dallas Cowboys, throwing for 93 yards on 10 of 18 attempts.