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.
Coach Steve Spagnuolo said the Rams were awaiting results of medical tests from a second opinion and was hopeful Ryan would return to practice Thursday.
NFL Network insider Jason La Canfora reported Sunday that Ryan is suffering from post-concussion syndrome.
Safety Craig Dahl also was held out after sustaining a concussion in a helmet-to-helmet hit with Raiders running back Darren McFadden.
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.
Wide receiver Laurent Robinson (foot) was limited, and Brandon Gibson and rookie Mardy Gilyard got snaps with the first string.
Rookie tight end Fendi Onobun, a sixth-round pick who played only one season of college football, at Houston, also took snaps with the starters. Billy Bajema (knee) and Michael Hoomanawanui (ankle) are both out, and Onobun expects to make his debut on Sunday against the Redskins.
The Associated Press contributed to this report.
