BOURBONNAIS, Ill. – The Bears made Trey Burton a priority target in 2018 free agency, with a plan. The fifth-year tight end had toiled in the long shadows of Brent Celek and Zach Ertz with the Super Bowl-champion Philadelphia Eagles, and Burton was deemed an ideal fit in the offense of incoming Bears coach Matt Nagy when he and GM Ryan Pace talked on the flight back to Chicago after his hiring. The objective centered around the “U” (mobile) tight-end role with which Nagy and coach Andy Reid had used with great success in the person of Travis Kelce in the Kansas City Chiefs offense.