The second overall choice of the 2017 NFL draft, Trubisky finished last season 28 in total QBR (39.4), tied for 27th in touchdown passes (17) and was 21st in passing yards (3,138), 32nd in yards gains for attempted pass (6.1) and 28th in the classification of traditional quarterback (83.0).
Trubisky, 25, will earn $ 4.423 million in 2020 and count $ 9.237 million against the salary cap.
Bears general manager Ryan Pace said last month that Trubisky and Foles will compete for the initial work in 2020.
"We increased the competition in a critical position and talked to the two players, and the way we see it is an open competition," said Pace on April 3. "And we thank you both for hugging her".
Trubisky underwent surgery in January to repair a partially torn labrum in his left shoulder and is expected to be medically released in the summer. He suffered a ruptured lip and dislocated his non-throwing shoulder at week 4 against the Minnesota Vikings, but he lost only one game.
The Bears negotiated their compensatory choice for the fourth round of 2020 for Jaguars for Foles and, in the process, inherited a contract that included about $ 21 million in guarantees. Foles, 31, later restructured the deal to allow him to cancel one of the past two years, depending on the performance advantage.
In 2018, Matt Nagy's first season as head coach, the Bears went 12-4, when Trubisky went through 3,223 yards, 24 touchdowns and 12 interceptions and ran for 421 yards and three touchdowns. He played in the Pro Bowl after that season.
ESPN's Jeff Dickerson contributed to this report.