Palmer (knee) was a limited participant Wednesday in his return to practice.
After the Chargers designated Palmer for return from IR on Wednesday, the team will now have a three-week window to evaluate him in practice before potentiall adding him back to the 53-man roster. The Chargers haven't ruled Palmer out from making his return to the lineup Sunday against the Broncos, but he'll likely need to upgrade to full practice participation Thursday or Friday in order to get the green light to play.