Robert Quinn, Cairo Santos join list of missing Bears at practice

Bears defensive end Robert Quinn rushes against the Packers in Week 2.Some of the Bears’ best players didn’t practice Thursday.

Bears defensive lineman Robert Quinn missed Thursday’s practice at Halas Hall because of an illness. Kicker Cairo Santos joined the list of missing players, too — he was out for a personal reason.

Running back David Montgomery, who has injuries to his right knee and ankle, and cornerback Jaylon Johnson, who hasn’t practiced in a week because of a quad injury, were also out. Montgomery isn’t expected to play Sunday; Johnson missed last week’s win against the Texans with the injury, which he suffered during practice.

Other Bears players who missed practice include Matt…