FILE - In this Aug. 16, 2008, file photo, Chicago Bears quarterback Rex Grossman throws during warmups prior to an NFL football preseason game against the Seattle Seahawks at Qwest Field in Seattle. The Houston Texans have signed quarterback Rex Grossman on Friday, June 12, 2009. Grossman, an unrestricted free agent, led the Chicago Bears to the NFC championship in 2006, when he threw for 3,193 yards and 23 touchdowns.