Blackwell tallied a tackle and an interception in the Bears' 35-16 win over the Jaguars on Sunday.
Chicago activated Blackwell (hamstring) from its injured reserve list Thursday, Larry Mayer of the Bears' official site reports.
Blackwell (hamstring) was designated to return from IR on Monday.
Blackwell (hamstring) is listed as out for Sunday's game versus the Broncos, Dan Wiederer of the Chicago Tribune reports.
Blackwell (hamstring) did not practice Wednesday, Kevin Fishbain of The Athletic reports.
Blackwell exited Sunday's contest against the Chiefs with a hamstring injury and is questionable to return.
Blackwell (hamstring) is practicing in full ahead of Sunday's Week 3 game against the Chiefs.
Blackwell signed his one-year tender with the Bears on Monday, Aaron Wilson KPRC 2 Houston reports.
Blackwell ended the season with 23 tackles, a forced fumble and a fumble recovery over 16 games played.
Blackwell (undisclosed) was placed on IR on Wednesday.