According to NFL.com writer Marc Sessler, the Bears have improved more during the offseason than any other NFL team.
"With talented play-caller-turned-head-coach Matt Nagy at the controls, the Bears have used this offseason to build around second-year passer Mitchell Trubisky," Sessler wrote. "After luring in big-fish wideout Allen Robinson, Nagy and friends added deep threat Taylor Gabriel and "Philly Special" hero Trey Burton. Burton is the kind of player who could see his role double in Chicago, while Gabriel looms as an X-factor if Nagy can unleash him the way Kyle Shanahan did with the Falcons two seasons ago."
Since the start of the league year March 14, the Bears have signed seven free agents from other teams—the aforementioned Robinson, Gabriel and Burton as well as quarterbacks Chase Daniel (Saints) and Tyler Bray (Chiefs), outside linebacker Aaron Lynch (49ers) and kicker Cody Parkey (Dolphins).
Following the Bears on Sessler's list of the most improved teams this offseason, he ranks the Vikings second (primarily for adding former Redskins quarterback Kirk Cousins and ex-Seahawks defensive lineman Sheldon Richardson), followed by the Browns, Jets and Rams.
Cleveland traded for quarterback Tyrod Taylor (Bills), receiver Jarvis Landry (Dolphins) and safety Damarious Randall (Packers) and signed running back Carlos Hyde (49ers) and cornerback Terrance Mitchell (Chiefs).
The Jets traded up in the draft with the Colts from No. 6 to No. 3 presumably to land a franchise quarterback, while the Rams made deals to acquire cornerbacks Marcus Peters (Chiefs) and Aqib Talib (Broncos).