The Facts: GM John Lynch said on KNBR Wednesday that McKinnon suffered a setback during Tuesday’s practice. Lynch said it was “not encouraging” and that the team would have a fuller picture of McKinnon’s outlook in a short time.

Diehards Line:McKinnon’s return to the practice field after last year’s torn ACL was followed by a long layoff and a platelet rich plasma injection intended to help him make a lasting return to action. It isn’t working out that way with a stint on injured reserve a distinct possibility. It also makes him undraftable until further notice.