The Chicago Bears have signed wide receiver Rashied Davis to a one-year contract and placed wide receiver Devin Thomas on the reserve/left team list. Davis spent last season with the Detroit Lions, recording four receptions for 63 yards through 11 games. The 33-year-old played the first seven years of his career with the Bears and has 92 career catches for 1,095 yards and five touchdowns over 103 games with 15 starts. Thomas announced his retirement on Sunday. The Bears play their first preseason game on Thursday against the Denver Broncos at Soldier Field.