Ryans was named the NFL's defensive rookie of the year in 2006. New 49ers linebackers coach Johnny Holland, under whom Ryans will work, was the Texans' linebackers coach that season. Ryans' last year as a player was 2015 with the Philadelphia Eagles. He started 13 games and finished with 32 tackles, five pass breakups and a forced fumble. This will be his first year as a coach.