ST. LOUIS -- St. Louis Rams defensive tackle Clifton Ryan, who missed last week's game because of what the team described as migraine headaches, was held out of practice Wednesday.
NFL Network insider Jason La Canfora reported Sunday that Ryan is suffering from post-concussion syndrome.
Dahl, who had a concussion last year, said he was still a little light-sensitive. Spagnuolo said Dahl had passed all tests and could return to practice on Friday.
The Associated Press contributed to this report.