INDIANAPOLIS - Chicago Bears general manager Ryan Pace reaffirmed the team's commitment to starting quarterback Mitchell Trubisky in 2020, but Chicago could change its offensive philosophy for the following season."To be clear, yes, it is," Pace said Tuesday from the NFL Talent Combine, when asked if the Bears' commitment to Trubisky remains unchanged. "We believe in Mitch. Mitch knows he needs to be better. We need to be better around him. That's our goal."The second overall draft pick of 2017, Trubisky finished the year at No. 28 in Total QBR (39.4), tied for No. 27 in touchdown passes (17), No. 21 in yards per pass (3,138 ), No. 32 in yards per attempted pass (6.1).The Bears went 8-8 and could not get into the playoffs. In 2018, Matt Nagy's first season as head coach, the Bears went 12-4 while Trubisky threw for 3,223 yards, 24 touchdowns and 12 interceptions, as well as running for 421 yards and three touchdowns."I think every quarterback grows in different areas. A big growth for a quarterback is to understand the coverages, to dominate your offense, to be comfortable with all the new things that the coordinators throw at you," Pace said."... I remember Drew [Brees], he went through that 2004 in San Diego; just immersed in it. That's Mitch's mindset now. Just being obsessed with learning NFL defenses, mastering our offense. And when you do those things, it allows you to play faster and with better instincts. "Trubisky underwent surgery in January to repair his left shoulder but is expected to be ready for the opening of the training camp in July. He suffered the injury during Week 4 against the Minnesota Vikings but only lost one game.Pace stressed that the Bears want competition in all positions - including quarterback - but the general manager stopped before revealing whether Chicago intends to add another quarterback via free agency or the draft.The Bears enter 2020 with a clear sense of urgency, particularly the offense, where Chicago ranked No. 29 in points per game and in total yards per game, No. 27 in ground yards and No. 25 in yards per pass per game.Nagy shook the group of offensive assistants last month, firing three coaches and hiring Bill Lazor as offensive coordinator, John DeFilippo as quarterbacks coach, Juan Castillo as offensive line coach, and Clancy Barone as tight end coach, in addition to promote Dave Ragone as passing game coordinator.