St. Brown and Blackwell both practiced in full Wednesday and were listed as questionable for Thursday night's home game against the Panthers.
St. Brown missed the last four games with a hamstring injury he sustained Oct. 5 in a 40-20 win over the Commanders. He was a healthy scratch the first three weeks of the season before appearing in two contests and catching one pass for 21 yards.
Blackwell has been limited to two games due to a hamstring injury, recording two tackles in Week 1 against the Packers and two tackles in Week 3 versus the Chiefs.
Like St. Brown and Blackwell, running back Khalil Herbert was designated to return from injured reserve and listed as questionable after practicing in full Wednesday. But Herbert remains on IR and will not play Thursday night.
Baskerville was flexed from the practice squad for the second straight week. The undrafted rookie from LSU made his NFL debut last Sunday against the Saints, playing 10 snaps on special teams after spending the first eight weeks of the season on the practice squad.
Carlson has not played in an NFL game since 2020 when he appeared in all 16 contests with two starts for the Browns, catching one pass for 11 yards.
The Bears also downgraded cornerback Tyrique Stevenson (ankle) to questionable for Thursday night's game.