DeShawn Wynn's season is over, while Koren Robinson's could begin Sunday at Kansas City.
With their roster exemption from the NFL for Robinson expiring, the Green Bay Packers added the reinstated wide receiver today.
They made room for him on the 53-man roster by placing Wynn, their leading rusher, on season-ending injured reserve.
Coach Mike McCarthy says Wynn has "a significant shoulder injury."
He suffered a "stinger" on the third play of the second quarter of the Packers' 19-13 victory at Denver last night.
Robinson isn't guaranteed he will return to action against the Chiefs, despite being officially on the roster.
He experienced soreness in his surgically repaired right knee during the five practices last week, preventing the Packers from activating him for last night's game.
McCarthy said the soreness was to be expected after Robinson's one-year suspension for his third violation of the NFL's substance-abuse policy.