EARTH CITY, Mo. -- The St. Louis Rams appear to be moving closer to getting a starting defensive end and right tackle back for this week's game against the Chicago Bears.

The Rams don't practice on Thursdays but release a hypothetical injury report with estimates on how much players would have participated had there been a practice. They upgraded four players from Wednesday to Thursday.

Most important, defensive end Robert Quinn (knee) and right tackle Rob Havenstein (ankle) were moved from non-participants to limited participation. That should be a good sign for them after missing last week's game against Minnesota. Rams coach Jeff Fisher said Wednesday that he expected Quinn and Havenstein to practice Friday.

Things are a bit murkier for safety T.J. McDonald (foot), who was listed as not participating Wednesday and again Thursday.

Elsewhere, running back Todd Gurley (rest) was upgraded from did not participate to full participation. The same is true for linebacker Akeem Ayers (illness). Gurley was simply given a day off on Wednesday.

Here's the full injury report for Thursday:

Did not participate: S T.J. McDonald (foot), DE Chris Long (knee).

Limited participation: DE Robert Quinn (knee), OT Rob Havenstein (ankle).

Full participation: RB Chase Reynolds (thigh), RB Todd Gurley (coach's decision -- rest), LB Akeem Ayers (illness).