Kurt Warner was hospitalized with a concussion after the Rams lost to the New York Giants Sunday.
A CT scan and X-rays on his neck and head taken Sunday night were negative.
Coach Mike Martz said the two-time league MVP would return to St. Louis today.
Martz said the injury might have occurred in the first quarter of the 23-13 loss when Warner was sacked in the end zone and fumbled, with the ball recovered for a touchdown by the Giants.
"He didn't seem the same after that," Martz said. "A lot of times he didn't seem to understand the plays we were calling from the sidelines."
Warner complained of an upset stomach after the game and lay in the trainer's room before Dr. Bernard Garfinkel, the team physician, made the diagnosis. Garfinkel said the concussion was "mild to moderate."
The Packers lost two of their top receivers on the same drive in a 30-25 loss to the Vikings.
Pro Bowler Donald Driver strained his neck in a scary fall in the fourth quarter.
Driver was to be kept overnight in the hospital for further evaluation today. Barring a setback, his playing status is week-to-week, team doctor Patrick McKenzie said.
Shortly after Driver was hurt, the Packers' other starting receiver, Robert Ferguson, tore ligaments in his right ankle and knee.
New Orleans Saints defensive end Darren Howard will miss up to three months after dislocating his right wrist against Seattle.
Atlanta Falcons receiver Brian Finneran broke two bones in his left hand and will be out four to six weeks.
Tennessee kicker Joe Nedney sprained his right knee as he tackled Ronney Jenkins on a kickoff return against the Oakland Raiders.
Two of the Dolphins' defensive backs were injured against Houston. Backup DB Shawn Wooden strained his right hamstring and broke his left hand, while CB Sam Madison twisted his left ankle.
Carolina linebacker Mike Caldwell injured his knee in the first half against Jacksonville and is likely out for the season.; Arizona G Leonard Davis and WR Larry Foster left the game against Detroit with ankle injuries; Chargers CB Tay Cody hurt his left hamstring early in the fourth quarter against Kansas City and is day-to-day; Bears starting right guard Chris Villarial sprained his knee in the first quarter against San Francisco.