In seven starts, Ryan has completed 202 of 285 passes (70.9%) for 2,170 yards, 15 touchdowns and eight interceptions. He has a passer rating of 98.7.
Ryan's injury, which was suffered after he was sacked by Rams defensive star Aaron Donald, was described as a high ankle sprain by Dr. David. J. Chao, a former NFL team doctor for 17 years. He also projected that Ryan would miss a week or two.
Quinn said Ryan pushed hard to play in the last game against Seattle.
Ryan missed two games in the 2009 season with a turf toe injury suffered in Week 11.
Trufant suffered a turf toe injury against Houston on Oct. 6. He missed the last three games. Before the bye week, he was running off to the side with the trainers, which is normally the first step to returning to practice.