Fleming grew up in Chicago, attending Simeon High School and Benedictine College in Lisle, where he caught 45 passes for 731 yards and 10 touchdowns and averaged 20 yards on six kickoff returns last season.
Asked Sunday if there were any tryout players who caught his eye in rookie minicamp, Bears coach Matt Nagy said: "There's a few guys. I think the one kid that stood out was Matt Fleming. Not a real big kid, but he made his assignments, did his job, made some nice catches.