St. Louis Rams defensive tackle Clifton Ryan was downgraded from questionable to out on the team's injury report, and he didn't make the trip to Oakland on Saturday.
Ryan was hospitalized overnight Wednesday with migraines, according to The St. Louis Post-Dispatch, then missed practice Thursday. He stretched with the team Friday, but didn't participate in drills.
"I've had them (migraines) before," Ryan said Friday, according to The Post-Dispatch. "I'll be all right. You'll see me Sunday."
The Associated Press contributed to this report.